Mehmed, having left the throne to his father Murad, returns to Saruhan to address local issues, including pirates obstructing trade. Solving this would fulfill the people's wishes and address a personal problem for Mehmed. The Venetians complain about Mehmed to Murad, and Çandarlı presents evidence against him, prompting Sultan Murad to summon Mehmed to account for his actions. Mehmed must either face the Sultan with Bali Beys or capture the pirate leader, Capello, to clear his name. In the harem, Mehmed's summons worries Hüma but pleases Halime. Mara plots to eliminate rivals for Mehmed by ensuring Ahmed's disappearance. The reactions of Hüma and any counter plans from Halime add to the intrigue.

Baltaoğlu Süleyman is found covered in blood in his tent, prompting Sultan Mehmed to order an immediate investigation. Hızır Çelebi leaves the suspects to their consciences, while Mehmed is eager for swift justice to avoid any delays in the conquest. Çandarlı dismisses the investigation as a waste of time. Amidst accusations against Bali Bey, an ambush further stirs tensions between raiders and janissaries. Zağanos and Bali Bey are held accountable, and Hamza from Köstenceli makes a decisive move, altering the balance. Saltuk announces Battal's martyrdom, and Don Francesco Constantine is troubled by the raiders near the city. Meanwhile, news of Don Francesco's arrival in Constantinople causes a stir, and Constantine considers seeking help from a warrior named Francisco. Tensions in the palace and on the front continue to rise, awaiting Mehmed's verdict.

Mehmed proved his innocence to Sultan Murad by capturing Capello. Murad then questioned Mehmed about the silver coins printed in his name, which Mehmed explained. With the Crusaders advancing, Mehmed proposed an Oghuz Union, which Çandarlı opposed. The council awaited Murad's decision. Following Murad's orders, Mehmed found Wallachians escaping from Janosh and planned an attack with their help. Janosh, however, also strategized against the Ottomans, leading to uncertainty about the outcome. Prince Ahmed choked on roasted chickpeas, witnessed only by Hüma and her apprentice Çeşmidil. Hüma faced a dilemma of whether to intervene or not, creating potential tension in the palace, especially with Halime. In Byzantium, Demetrios escaped a trap and became emperor, surprising Helena, Konstantinos, and Notaras. Demetrios's judgment on the attempt and the responses of the others remain to be seen.

After Admiral Rizzo's betrayal and Hayrettin's death, Mehmed plans revenge, forcing Rizzo to seek refuge in the Pontus Greek Empire, which must choose between surrendering Rizzo or facing Ottoman wrath. Rizzo is also targeted by Çandarlı for causing his nephew's death. In Byzantium, Emperor Constantine invites Notaras, who begins forming alliances with the Kingdom of Serbia and Karaman Principality, aiming to corner the Ottomans. The success of these alliances and their impact on the Ottoman siege plans remain uncertain. In the Harem, the alliance attempts affect Mara Hatun and Gülşah Hatun, creating tension and a test of loyalty towards Mehmed, possibly leading to a rift.

Mehmed uncovers Ferhat as a spy for Byzantium and executes him. This revelation prompts Mehmed to question how such a spy operated undetected and who might be accountable. The Pope's favorite, Salvador, is murdered, creating a crisis in Byzantium. Meanwhile, Baltaoğlu seeks to regain his position after taking refuge with Kurtçu. His desires could have significant political implications. Maria tries to clear suspicions surrounding her, while Notaras and Gennadius play crucial roles. Baltaoğlu's encounter with Harry, who caused his disgrace, could lead to revenge or a different path. These events significantly impact Mehmed's plans and Byzantium's defense.

The stage is set for the final phase of the Ottoman conquest of Constantinople. The Ottoman army, led by Mehmed, intensifies its efforts, with ships transported overland into the Golden Horn, shocking the Byzantine defenders. Amid panic in the city, Konstantinos reluctantly trusts Francesco and his knights, while Plethon plots to set the Ottoman fleet ablaze. Inside the city, Saltuk devises a rescue plan with Maria. Mehmed, unwavering in his determination, rallies his council and declares his resolve to take the city at all costs. As dawn approaches, the Ottoman army prepares for the ultimate assault, and the fearful Byzantine citizens brace themselves for the impending fall of Constantinople. Victory seems imminent for the Ottomans.

Prince Alaaddin's unexpected death prompts Murad Khan to retreat to Bursa, succeeded by his son Mehmed. Despite being perceived as immature by European states, Mehmed proves otherwise when faced with Orhan, backed by Byzantium, in his first major battle for the throne. Mehmed's dream is to conquer Constantinople, despite doubts from those around him, including Çandarlı. Mehmed's determination leads to clashes with rebels, orchestrated by Çandarlı, resulting in his exile. However, Mehmed remains resolute, destined to return as sultan one day.

Mehmed, having executed the Byzantine ambassador, announces his goal and demands immediate preparations, instructing Urban to expedite his work. He sends Zağanos Pasha to implement a justice revolution and prepare for conquest, but Zağanos returns unsuccessful. Determined, Mehmed plans to personally convince Hızır Çelebi. Gülşah suspects Mihriban of betrayal and informs Hala Sultan. Hala Sultan must convince Gülşah, while Mara, mistrusting Hala Sultan, pursues her, leading to a confrontation. Konstantinos seeks to halt the fortress construction, with Sfrancis suggesting a raid involving Orhan. The Balinese working on the fortress face potential attacks, raising questions about their ability to resist.

Teke Sanjak Bey Ismail and those responsible for the assassination attempt on Sultan Mehmed with the poisoned robe await the Sultan's verdict. Zağanos, who revealed the plot, might influence Mehmed's judgment. Zağanos Pasha, who acted without the Sultan's approval and caused Demetrios' child's death, faces a potential showdown with Çandarlı Pasha. Meanwhile, Sultan Mehmed must respond to the massacre of Ottoman Janissaries in the Golden Horn, which could significantly motivate the council and army and impact the siege. Guistiniani, planning through Lorenzo, aims to counter the Ottomans, possibly informing Constantine. He seeks to expose spies within Byzantium. Key players like Lomellino, Minotto, and Lorenzo face significant developments amid these showdowns.

As Sultan Mehmed prepares for the great siege, he aims to breach the walls and enter the Golden Horn. He assigns critical responsibilities to his trusted men and plans who will sit on the throne during his absence. He must appoint someone to the Rumelia Beylerbeyship after Hamza is wounded, with Çandarlı Halil Pasha and Zağanos Pasha's input. Saltuk and Bali have important tasks until Hamza returns. In the harem, a surprise occurs during Beyazıd's journey to Manisa. Meanwhile, Constantine works on creating grejuva fire against the Turks, and Giustiniani seeks to expose Turkish spies in Constantinople, including suspicions about Mustafa. Giustiniani holds Notaras responsible for Cardinal Isodor's death, and the Emperor must respond. Demetrios plans against Hamza, and there are surprises in the mission to bring Giustiniani and those with the grejuva secret to the city.

The Ottoman siege of Constantinople reaches a decisive stage as Sultan Mehmed employs innovative strategies, including transporting ships overland to the Golden Horn, while facing internal debates over his bold moves. Within the city, tensions escalate as disagreements between Constantine, Francesco, and Notaras weaken morale, and Genadius exploits the chaos. The betrayal by Demetrios, who secretly allies with the Ottomans, further destabilizes the Byzantine resistance. As Ottoman cannons relentlessly pound the city's defenses and Mehmed strengthens the siege with diplomacy, the final attack begins, forcing Constantine to confront both internal treachery and the overpowering might of the Ottoman forces.

Sultan Mehmed asserts his authority by punishing Coco publicly and teaches a harsh lesson to onlookers. Meanwhile, Saltuk and the unexpected ally Notaras manage to save Satılmış Ağha, one of Mehmed's trusted soldiers, despite his critical injuries. The story raises questions about Satılmış's survival and the loyalty of Notaras, who has entered Sultan Mehmed's service but is hunted by the enraged Francesco. Sultan Mehmed moves forward with his bold plan to conquer Constantinople while enemies like Francesco plot ruthless responses. The passage hints at upcoming challenges, betrayals, and traps as the conquest advances.

Sultan Mehmed's long-awaited victory marked the end of an era and the dawn of a new one, as he overcame all obstacles to conquer Constantinople and defeat his enemies. Following the conquest, the city became a hub of transformation, with old alliances dissolving and new ones forming. Amid this upheaval, Çandarlı Halil Pasha, who had opposed the attack, faced a day of reckoning as secrets, betrayals, and hidden truths surfaced. Determined to prepare the state for this new era, Sultan Mehmed pledged to settle lingering conflicts and navigate perilous alliances, taking critical steps to establish Constantinople as a Turkish Islambol.

Mehmed narrowly escapes an ambush by Janosh and faces the challenge of assisting his father, Murad, who is under attack from Wallachians with explosive pots. Murad must also defend himself against a sneaky Wallachian. Upon returning from the victorious Kosovo War, Çandarlı seeks revenge on Mehmed by setting up a scheme during Zafer Toyunda. Mehmed and Gülşah's marriage occurs with Sultan Murad's and İbrahim Han's permission, despite Mehmed's reluctance, causing concern for Bahar. In the harem, Halime Sultan manipulates Murad to send Hüma to Bursa, worsening Hüma's illness. Halime continues plotting, now focusing on Gülşah as Mehmed's wife.

Mehmed, having overcome many obstacles, prepares for the siege of Constantinople, uniting his viziers and subjects. He strengthens the navy, led by Baltaoğlu, who aims to reunite with his brother, Rizzo. Çandarlı makes Rizzo grateful to the Ottomans, and Mehmed sets his plan on Rizzo, whose help is crucial. In the Harem, preparations for the siege continue, with Mara, Bahar, and Gülşah actively involved. Gülşah's pregnancy adds excitement, with the upcoming birth expected to change the harem's dynamics. In Byzantium, the fear of the Ottomans grows, and Constantine, struggling to make decisions, is advised by Plethon to call Notaras back. This decision's impact on the Byzantines remains to be seen.

After thwarting Byzantium's plans and responding to Notaras, Mehmed continued his conquest preparations, warning his pashas to stay vigilant, especially Baltaoğlu. However, Baltaoğlu fell victim to Konstantinos' plot. Çandarlı, seeking revenge for his nephew Hayreddin, focused on finding Rizzo. Konstantinos, seeing the failure of alliances with the Serbs and Karamanoğlu, sought the Pope's support but was rejected, except by Giovanni Giustianni, who nonetheless set off for Constantinople.

Prince Mehmed, ambushed by the poor, fights fiercely as İshak approaches with his men. Mehmed later returns to Edirne and moves his harem to Manisa, where he receives a letter to Gülşah prompting a journey to Karamanoğlu. Murad deteriorates after Hüma's death, causing concern for Çandarlı, who contemplates measures for the state's future. Mehmed, aware of the situation, leaves Şehabeddin in Edirne. In Byzantium, tensions between Konstantinos and Helena intensify as Konstantinos prepares to make significant changes, with Helena and Notaras posing major obstacles.

After ascending to the throne, Mehmed confronts Halime for attempting to kidnap Ahmed and Çandarlı for his alleged complicity. Halime faces a choice: implicate Çandarlı or remain silent. Mehmed establishes a new order in the palace and must decide on the Grand Vizier. In the harem, Bahar becomes the chief haseki, marking a new era. Hala Sultan's unexpected arrival disrupts the harem's order, and her first move targets Halime. Gülşah is placed under Bahar's influence by Mehmed. Çandarlı plans a new strategy against Mehmed, using Piri Pasha's arrival to pit the Ottomans against Karaman. The unfolding events set the stage for further political intrigue and power struggles.

A cannon explodes near Mehmed, turning the area into chaos. Quickly removed, Mehmed faces more disappointments, including a fortress raid and Mara's kidnapping, pushing him to demand accountability from the betrayer and the careless. Konstantinos, having kidnapped Mara, tries to convince her to marry him, but Mara stands firm. The outcome of this struggle remains uncertain. Orhan seeks revenge on Bali, whose fate is in question. Hala Sultan, having created space by removing Mara from the harem, has new goals. It is uncertain whether Bahar and Gülşah will counter her moves or if Hala Sultan will dominate the harem.

Mehmed holds Baltaoğlu Süleyman Pasha accountable for Guistinianni's entry into the city, facing a potential execution. Çandarlı may try to persuade Mehmed to change his mind. In the harem, Prince Beyazıd's discomfort might continue due to the attention given to Mustafa. Meanwhile, the Balinese pursuing Demetrios in Mora face various challenges and obstacles, with Demetrios and his wife Theodore plotting their own strategies. In Constantinople, the arrival of Guistinianni's soldiers will impact the city's atmosphere. Both Ottoman and Byzantine sides prepare for tactical battles before the siege, with Mehmed planning his moves towards the city's walls and gates. The responses of Zağanos, İshak Pasha, and other Kubbealtı ministers to Mehmed's strategies, as well as the defensive plans of Konstantinos, Notaras, and Giustinianni, will shape the upcoming conflict.

Mehmed questions Gülşah and Bahar, blamed for Prince Beyazıd's condition, about their responsibilities. The harem's roles might change, with Mara Hatun managing potential conflicts. Demetrios, grieving his child's loss, considers avoiding the Byzantine-Ottoman conflict, while Theodore, devastated, urges him to leave for Morea. In the Ottoman court, Zağanos Pasha, who acted without Mehmed's approval, faces potential consequences once Mehmed learns the truth. Guistiniani, arriving in Constantinople, aims to defend the Golden Horn against the Turks, while the Emperor strategizes amidst internal disagreements. Guistiniani also targets Turkish spies in the city. In Galata, tensions rise as Notaras deals with Lomellino, who sides with the Turks, and Janissaries are sent to protect the Golden Horn chain. Sultan Mehmed calls for an unprecedented consultation with the sanjak beys, including Teke Sanjak Beyi Ismail, whose political stance before the siege remains crucial.

Mehmed embarks on his conquest with a desire for martyrdom. His success depends on his staff agreeing on the strategy and shaping his policies towards his vizier and the Janissaries. Hamza's wounding affects the Malkoçoğlu tribe and the Rumelia Beylerbeylik, with moves expected from Çandarlı and Zağanos Pasha. Guistiniani suspects Mehmed's spy Mustafa and needs to present proof to Emperor Constantine. Nadia seeks validation from Guistiniani despite her romantic entanglement with Anna. Notaras, implicated in Cardinal Isodor's murder, seeks assistance. Demetrios, grieving his child's death, must decide on his political allegiance. The safe arrival of Mehmed's Şahi cannon is crucial, while the Grejuva master must meet Konstantinos' expectations. Internal conflicts among the Janissaries add tension. These events will determine the outcome of Mehmed's conquest.

Urban and Mehmed insist the damaged Şahi cannon be detonated, tasking Saruca with this risky mission. The explosion's aftermath for Mehmed is uncertain. Çandarlı aims to win Mehmed's favor for Kalender and isolate Kurtçu politically. Çandarlı, Zağanos, and İshak Pasha hope to use Plethon's peace call to their advantage, questioning if they realize it's a ploy. Demetrios, grieving his child, seeks Hamza. Alperen, having volunteered without consulting his father, contemplates his actions post-discussion. Konstantinos searches for Cardinal İzodore's killer, awaiting crucial news. With the Turks nearing, Konstantinos plots his next move. Orhan and Mustafa face potential danger. Emotional ties between Guistiniani and Anna develop, while Guistiniani's suspicion of Notaras in Isodore's death is under scrutiny.

Harry's death causes significant turmoil at the headquarters. Mehmed must navigate the chaos and maintain the delicate balance among Çandarlı, Zağanos, Akşemseddin, and the Janissaries. His decisions in the council before the conquest will resonate within the army and the spiritual leaders at the headquarters will impact the soldiers' morale and enthusiasm. Mehmed's consultations are crucial for strengthening his dominance over the army. Meanwhile, Francesco faces a difficult crossroads following his brother's death, and must decide whether to accept an offer that brings him closer to Byzantium or take on the Turks, potentially ignoring his old friendship with Mehmed. Constantine will make new moves to protect his city, to which Mehmed must respond. In the palace, Bahar and Beyazıd will encounter significant surprises, while Evrenosoğlu and the Akıncı will face a development that changes their fate.

As Mehmed prepares his army for a great attack, he navigates delicate internal and external balances involving Çandarlı, Zağanos, and Akşemseddin. His water channel and sewer strategy to breach the walls causes concern for Çandarlı. With final preparations underway, a new spiritual power emerges within the army, bolstering the soldiers' enthusiasm. Mehmed's consultation with Akşemseddin draws curiosity. On the Byzantine side, Francis faces a dilemma after his brother's death and must decide whether to align with Constantine or honor his past ties with the Turks. Demetrios' intelligence will impact the balance. As the countdown to the conquest begins, Mehmed's army awaits his final order, and tensions rise between the Ottoman and Byzantine soldiers. Mehmed's decisions will shape the fate of Constantinople.