In the second episode of the trilogy Fantômas kidnaps distinguished scientist professor Marchand with the aim to develop a super weapon that will enable him to menace the world. Fantômas is also planning to abduct a second scientist, professor Lefebvre.

An Italian prison official's wife is kidnapped, and the kidnappers demand that a notorious prisoner be released in order for the man to get his wife back. He gets the man released - but then kidnaps him himself, in order to ensure that the man's colleagues don't kill his wife. Enraged, the gang sets out to free their compatriot and kil...

Some youngsters rape and kill their teacher; but they won't tell their motivation. The police detective on the case feels some sinister influence behind the young murderers.

A vengeful criminal targets the inspector who put him away, but the inspector survives and fakes his death. Ignoring orders to flee, he sets out to bring the fugitive back to justice.

A top undercover cop finds and arrests a series of purse snatchers until he discovers an American at the top of an evil ring of thieves.