After 20 years, Nick Graf is released from prison. In the 70's and 80's he and his wife Gina committed a series of brutal bank robberies. Now he is terminally ill and has nothing left to lose. Graf has only one thought: Before he dies, he wants to take revenge on Rudi Fromm, who arrested him at the time. Although Fromm is now retired, he takes up the fight; he goes into hiding and wants to find Graf on his own. Fritz Dellwo and Charlotte Sänger try everything to track down Fromm and prevent the worst from happening. While searching for Graf and Fromm, they learn things about their boss that they previously had no idea. When the suspicion arises that Rudi Fromm could be a murderer himself, Dellwo vehemently denies this notion. Fritz is firmly convinced that his longtime colleague and friend Rudi is not capable of murder.