Berlin provides the backdrop for this crime drama that centers on a military doctor falsely accused of dealing illegal drugs. Determined to prove his innocence, he escapes from the MPs and ends up holing up in the apartment his wife rented. He doesn't know that she has sublet the flat to a nightclub singer. When he finds out, he begs the singer to assist him. She is attracted to him and agrees. The doctor believes that his wife is behind the black-market dealings, but in the end, they find the real culprit.

Dr. Bonner plans to live forever through periodic gland transplants from younger, healthier human victims. Bonner looks about 40; he's really 104 years old. But people are starting to get suspicious, and he may not make 200.

Police find that everyone had a motive for the murder of a wealthy woman.