Enigmatic gangster Silien, who may or may not be responsible for squealing on Faugel, has just been released from the slammer and is already involved in what should be a simple heist.

On a train bound for Switzerland, a secret agent entrusts Marie-Chantal with a jewel in the shape of a panther with ruby eyes. Unbeknownst to her, this jewel contains a virus powerful enough to destroy all humankind.