A penniless pianist is being offered a strange but lucrative contract he can't refuse.

Following a denunciation, a man is forced to flee the police who are looking for him for murder. In his fight to make the truth triumph, he will discover that the culprit of the crime attributed to him is none other than his best friend.

A musician named Jacques Christens, is given a proposition by an old man. For ten million Francs he is asked to impersonate a certain Paul de Baer – a man who is supposedly exiled in the Amazone. Christens is told this scheme will save Mr. Baer from ruin. An adaptation of Boileau and Narcejac's "D'entre les Morts".