Sultan Mehmed faces a turbulent chapter marked by personal grief and political upheaval, as the critical condition of Prince Beyazıd stirs unrest within the palace. Amid rising tensions in the imperial court—fueled by rivalries between Mahmud Pasha and İshak Pasha, and debates over Zağanos Pasha—Mehmed navigates shifting alliances against Karaman, Pontus, and the Vatican. While Beyazıd clings to life, Mustafa is ceremoniously inducted into the Janissary corps and sent on campaign. As Vlad Tepes plots in Pontus and the Karatuğs endure torture, Basat grows wary of betrayal. Mehmed’s decision to recall Zağanos Pasha signals a pivotal shift, just as the Ottoman army marches toward Beyşehir, where an impending battle and palace power shifts will shape the empire’s destiny.

As Sultan Mehmed struggles with internal strife sparked by Prince Beyazıt’s rebellion and the dismissal of İshak Pasha, tensions escalate within the palace and harem, while external threats loom as Pontus and Karaman seek alliances against the Ottomans. Vlad and the Karatuğs pursue sacred relics amid Vatican conspiracies, facing both enemies and inner turmoil. Süleyman, blaming Beyazıt for Julia’s death, stirs rebellion through İsfendiyaroğlu Kasım Bey. After Beyazıt is gravely wounded in an ambush, Sultan Mehmed, consumed by fury, rallies the Janissaries and declares war on traitors, plunging the empire into a dark tide of vengeance.

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.

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 uncovers a dark organization lurking in the city, and as he strategizes to expose it, Agamemnon sets his own plans in motion—kidnapping Beyazıd under orders from Pontus. Meanwhile, Çandarlı methodically closes in on Nemesis and Agamemnon, hoping to beat Mehmed to the punch. Elsewhere, the Prince of Moldavia, sensing Ottoman power rising, attempts to unite kingdoms but faces resistance from Mara. In a desperate move, he takes Mara’s brother hostage, only to confront Vlad’s merciless nature as Vlad marches against him on Mehmed’s command. The unfolding events will determine who prevails in this tangled web of power, deception, and conflict.

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.

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.

Driven by his vision of the "Three Romes" and inspired by the Battle of Yarmouk, Mehmed the Conqueror sets his sights on the Pontic Empire, prompting Emperor David Komnenos to seek support from Pope Pius II and forge strategic alliances using sacred relics from the Sumela Monastery. As political tensions rise, a mysterious Aramaic-inscribed parchment discovered in Hagia Sophia draws Mehmed’s attention, leading him to summon the eccentric "Mad Lütfi" and assign Vlad Tepeş to decipher its secrets. Amid dynastic maneuvering and shifting allegiances, the unfolding drama tests not only imperial ambitions but also Mehmed’s deepest personal dilemma: choosing between the survival of his empire and the fate of his own children.

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.

Mehmed captures Plethon, who refuses to betray anyone during his interrogation, leading to Mehmed’s final judgment. As new regulations reshape the palace, Beyazid, intrigued by his father’s tales, escapes and encounters Agamemnon. After killing Saltuk and Fatima, Agamemnon sets his sights on Hızır Çelebi, aiming to destabilize Ottoman justice by luring him into a trap. Meanwhile, Beyazid’s disappearance sparks panic in the harem, prompting Mehmed to turn the city upside down in search, while Bahar grapples with overwhelming fear.

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.

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.

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.

Sultan Mehmed summons Çandarlı to the palace, unaware that his downfall is approaching as Zağanos plots against him. Capturing Notaras, Zağanos sets a trap to expose Çandarlı, ensuring Mehmed witnesses everything. Meanwhile, Vlad reunites with Mehmed and becomes part of his plans. Mehmed dispatches Evrenosoğlu and Bali to confront Pontus, the force behind Agamemnon, but they fall into an ambush. Çepni warrior Şamil rescues them, allowing Evrenosoğlu to demand answers from the Pontic emperor in Mehmed’s name. Now, the emperor must decide whether to submit to the Ottomans or resist in defiance.

Sultan Mehmed faces a harrowing dilemma between safeguarding his empire and disciplining his son Beyazıd, who defies orders and stirs unrest by leaving his sanjak amid Karamanid threats demanding his surrender. As Mehmed puts Beyazıd on trial, a deeper conspiracy unfolds: Pontic Emperor David Komnenos and Pedri ally with Karaman to incite rebellion among Turkmen lords, while Mehmed pursues a sacred icon hidden in Hagia Sophia. Provoked by the Karaman envoy’s threats, Mehmed executes the ambassador and launches the Pontus Campaign to crush Roman influence in the Black Sea, confronting both internal discord and the remnants of Byzantine power.

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.

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.

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.

Mehmed's response to Plethon's peace offer and his complacent minister will impact the conquest. Zağanos brings news involving Evrenosoğlu, influencing Mehmed's stance. Mehmed's reaction to Grejuva's attack on the Janissaries will shape the general assault and its outcomes for Kurtçu. Çandarlı Pasha delivers crucial news from Constantinople, potentially altering decisions. Alperen, who joined the siege without consulting Evrenosoğlu, faces significant actions. Ferhat, backed by Çandarlı, aims to secure the Rumelia Beylerbeylik seal and win the Sultan's favor. Demetrios' motivation against Mehmed is in question upon his return. Nadia, jealous of Anna and Guistiniani's relationship, plans an attack, potentially impacting Guistiniani's motivation.

Mehmed, determined to take Constantinople, casts a new hawk cannon and digs a tunnel for underground advance. Satılmış Ağa helps overcome obstacles in the tunnel. After the martyrdom of his spy Mustafa, only Fatima remains to provide crucial war-changing news to Mehmed. Guistiniani, after securing help from the Pope, brings aid to Constantinople with John Grant. Mehmed must decide how to stop these aid ships. Battal, seeking revenge for his murdered family, targets Janosh. Whether Battal will succeed in killing Janosh is uncertain. Notaras disapproves of his daughter Anna's relationship with Guistiniani, preferring her to marry Konstantinos. Anna's suicide disrupts Notaras' plans, creating uncertainty about her survival and Notaras' next move. Kalender, consolidating power, faces opposition from Kurtçu, leading to a conflict that will influence upcoming events.

Murtaza and the rebels receive punishment, causing unrest in the headquarters. Mehmed's harsh justice affects the army and Kurtçu's stance is crucial. Akşemseddin meets Harry in the prison camp to maintain balance between the çeris, raiders, and volunteers, impacting his relationship with Mehmed. Hızır Çelebi investigates Baltaoğlu's murder amidst rising tensions, while Francesco's decision in the Byzantine world influences the conquest. Harry, suspected of murder, faces divided suspicions, with Çandarlı trying to clear his name and his journey with Zağanos Pasha potentially altering his standing.

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.