Former GDR secret service agent Wolfgang Dreher is sentenced to life imprisonment. While still in the courtroom, he threatens to wake up his sleepers if the sentence is not overturned. The assignment: the Federal Prosecutor General. Nicola Helling, an agent at the Federal Criminal Police Office, tries in vain to prevent the assassination attempt. But Dreher is still not free. His next assignment: an assassination attempt on the Federal Chancellor. Nicola Helling heads the SOKO, which is searching for the sleeper agent - who is apparently among the ranks. When Dreher dies in prison, the only link to the killer is lost...

It takes time for Lukas to understand who the little boy in his room is. When Lukas listens to him one day, a journey into his inner world of memories begins. A man whom Lukas had long tried to forget is waiting in a deep cellar... Sometimes you have to face your dark memories. Otherwise they become so powerful that they destroy everything you are. Not least what you love.

Viktor, a methodical hit man, probably on his last job, has no plan for his retirement. He does not kill Nina, a woman sleeping beside his latest mark; then he follows her and rescues her from an attempted suicide. Nina is attracted to him, but also wants to know who he is. Her pursuit of his identity crosses the investigation of Lang, a brilliant police investigator who tries to inhabit the minds of the victims and the killer. Viktor's employer also wants to kill Viktor and his contact, an aging arms dealer and family friend. Does Viktor have a future?

Rolf Köster has been working as a cashier in a small bank branch for years. Every day passes like the day before. He has a thirteen-year-old daughter who would rather write in a diary than speak and a six-year-old son who has to wear a bicycle helmet because he is constantly banging his head against walls. His wife organizes the whole family life, and Rolf stays in the background. But he has doubts as to whether he, who has "everything", is really happy. Then Rolf is unexpectedly given a week's vacation. He decides not to tell his family and to leave the house as usual. Rolf Köster begins to lead a double life.