Jules Maigret, a meticulous Parisian police detective, is a famous literary character. In this film adaptation of his stories, he's trying to solve a murder of a friend, a P.I. who was looking into an industrialist and his family.

Faustus is a scholar at the University of Wittenberg when he earns his doctorate degree. His insatiable appetite for knowledge and power leads him to employ necromancy to conjure Mephistopheles out of hell. He bargains away his soul to Lucifer in exchange for living 24 years during which Mephistopheles will be his slave. Faustus signs the pact in his own blood and Mephistopheles reveals the works of the devil to Faustus.