Berg and Bela are married stunt drivers, but one night Bela dies in an accident. Jaded and reclusive, Berg becomes a nighttime security guard where he befriends a young woman, Mimi, who works nights too. Soon a shadowy figure from Bela's past comes into Berg and Mimi's lives. Berg is forced to protect Mimi and seems responsible for a murder, but the man from Bela's past who caused her so much pain won't stop until he sees Berg suffer as much as Bela did.

In this action comedy the French boxer Jo Cavalier is charmed on the train to Berlin for the Olympics in Hitler's Germany by the little boy Simon Rosenblum who asks his autograph; when it turns out his adorable young fan is a Jewish orphan in danger of persecution, he risks his one shot at Olympic glory to save Simon and his family, helped only by a German officer-gentleman who became his friend in World War I, by an adventurous escape to Switzerland, Nazi troops on their heals and braving impossible odds in roller coaster-style.