The mysterious murder of a female student causes unrest in university circles. With a close suspect, a close associate and friend, Professor Dimitris Lainis hastens to unravel the mystery.

Investigations into the murder have begun. And while the new Deputy Chief is determined to change everything, a mysterious file reaches the hands of the Director of Police Laboratories.

Continuing the search for the murdered student, the police take DNA and fingerprints from the professors and the university staff. The pressure peaks when a new corpse is discovered.

The two victims have one thing in common: a tattoo on Medusa's head. Later, after his visit to the University, Lieutenant Sklavis finds a note with the name of a girl.

Everything shows that the organization continues its activities. And while Christina is doing an interview in prison, the police visit the mother of the murdered student. Is there any new evidence of her death.

A new suitor for the position of the leader of the organization makes his appearance. Meanwhile, police officer Carra continues the investigation, while a creepy video reaches the hands of Velissaratos.

While Lainis learns about the video, journalist Stergiou risks her life again. Meanwhile, the police continue the investigations and the unexpected meeting of two members of the organization brings upset.

All the pieces of the puzzle are in place. All that is missing is the arrest of the culprits and the identification of the Reptile. A voluntary testimony will lead the police to a meeting with him, in the subversive finale.

The crisis in Apostolos's relationship with Eleni escalates. At the same time, while the police interrogate those involved in the explosion, the appearance of people from the past complicates things even more.

Danae is visiting Laini, who has now returned to his teaching duties and reveals her plans in relation to the "other me" case. Athena solves the case of 18 -year -old Melina. Masatos is in the hospital after Vanorta's attack. At the same time, a second case of homicide occurs, while the police are dealing with the explosion in the funeral home.

While Tonya's father demands answers, Christina accepts a proposal from Danae. At the same time, the police investigation into the explosion and the identification of Staikos has reached an impasse.

Professor Dimitris Lainis puts all the pieces of the puzzle together, while the police receive an unexpected proposal that causes moral dilemmas. Everyone is held accountable for their actions and punishment meets justice. "Nemesis" is coming for everyone.

While Athena becomes the new Head of Homicide and Dimitris mourns the loss of his beloved Tonia, a deadly explosion forces the Department to regroup and take action.

An unlikely alliance is born as the police's plan fails, forcing Laini to become involved in the investigation. Meanwhile, the authorities are informed of another murder.

Forensic results turn everything upside down in the explosion case, leading to yet another impasse. Faced with new information, the police implement a plan to shake things up.

The police finally achieve a major breakthrough in their investigation, thanks to the help of not only Dimitris Lainis but also some unexpected allies.

A brutal murder alarms the police authorities. With the investigation leading to confusing controversies, the eccentric professor of criminology Dimitris Lainis is asked to shed some light on the mystery.

A woman is found mysteriously murdered. Soon her identity is revealed, but the enigma surrounding the circumstances of her tragic death remains unsolved. A female eyewitness might give some answers.

The number of victims keeps rising, leading to more questions and confusion. While the police interrogations go on, Dimitris Lainis is looking for clues in the most unlikely source: The Feats of Theseus.

The police authorities 'return' to the first crime scene, looking for new clues. In the meantime, Barasopoulos decides to engage Christina in the case, so they can both benefit from their collaboration.

While the investigations continue, Barasopoulos and Christina agree on the usefulness of an urgent news bulletin. Their aim is to upset the elusive perpetrator and lead him to a revealing mistake.

New leads draw Dimitris and Barasopoulos ever closer to the elusive culprit and lead them to an alarming conclusion. Will they be able to predict the perpetrator's dramatic next move before it's too late?

While the police investigations continue, Dimitris Lainis examines the details of Theseus' Feats in his attempt to decipher the enigma. Developments, however, surpass him. One more feat gets 'checkmarked'.

In the dramatic last episode, the police authorities race against time to locate the perpetrator and put an end to his killing spree. Will they succeed in solving the mystery and finally closing the case?