This Italian black-and-white film, based on a true story, was originally made for television. It concerns the life and sad end of Evariste Gallois (Mario Barriba), a brilliant student mathematician whose republican politics and hot-bloodedness resulted in his death; it is unclear whether he died by political assassination or as a result of a duel.

A serial killer who specialises in killing teachers is on the loose and Andrea becomes accidentally involved when he decides to lend a hand to one of the victims and catches a glimpse of the nocturnal predator.