A serial killer reverts to the 10 commandments in order to kick society a conscience with his crimes.
Jaded detective Peter Devriendt and his new partner Vicky Degraeve investigate when a 16-year-old Turkish girl is brutally murdered. Everything points to an honour killing, but they have no proof.
The presumed perpetrator of the honour killing has been burned alive and now lies in a coma. The detectives have no clues about who did this to him, so Peter meets up with Hristo, his informant.
It seems a serial perpetrator, who goes by the name of Mozes, is at work. The team receive an email that contains photos of three potential victims, and have the third commandment as their only clue.
A video recorded by Mozes leads the team to the Alegria rest home, where one of the residents hasn't received any visitors for a year. Peter and Vicky investigate and make a horrible discovery.
Internal Affairs tackles Marnix and Simon over the shooting. Peter and Vicky probe further at the rest home and get much closer to Mozes. The press runs at full speed when Mozes seems to strike again.
Mozes remains untraceable but Hristo knows where to find the car he used. New information leads to another person of interest, but he's been in an unresponsive state in an institution for over a year.
The theory that Mozes deals with the commandments chronologically begins to fall apart. Meanwhile, the media blow up the Mozes phenomenon to giant proportions, and some even find ways to support him.
The daughter of a gambling website boss has been kidnapped and the crime claimed by Mozes, putting the police on high alert. Thanks to a fingerprint, they find a new lead. Has Mozes grown negligent?
Angry that he has been taken off the investigation and replaced by Tony, Peter spends his time helping his daughter fix up her apartment. Professor Jos Schatteman's name pops up in an old police file.
Is what happened to Schatteman the work of Mozes? Tony keeps digging and Liesbet puts Peter back on the case. Mozes asks the religious community run by Jacob Moreels for help and they happily oblige.
Moreels is released due to insufficient evidence, the press start to ask questions and Liesbet is under pressure. Sara is hospitalised by an overdose, while Chantal gets too close to Peter's secret.
Vicky and Tony look into Amalia's murder and question her daughter. Did the child speak with her mother's killer? Was Mozes the perpetrator? Vicky tries to complete the puzzle and asks Peter for help.