Commissioner Maik Brunner is director of an operation command, that wants to catch a kidnapper and serial killer. His girlfriend Bettina is pregnant. The two live temporarily at her mother Heike. When Bettina goes with her mother to the funeral of her recently deceased father, Maik doesn't accompany them. His own father was killed at the inside-German border and Bettina's father was an officer in the GDR border troops. Suddenly Bettina is abducted at the funeral. During the search for her it happens an accident: Maik tried to defense a subway, loses consciousness and wakes up in the GDR of the year 1984 in a hospital. Some VOPOS describe him as "Captain Brunner." Maik is totally confused, as even 20 years younger Heike appears. Nevertheless, Maik is picked up to the service by his colleague Gaby Krempe because he should also find a serial killer in 1984.