A rich man gathers together friends and relatives at the abandoned theatre he owns, but the party isn't fun for long since apparently one of them is a murderer.
A man returns home to his wife from a business trip only to find a dead body in their yard.
Don Giorgio, a handsome young priest and teacher in a convent, is involved with two lovers: Orchidea and Giulia. When he repents and vows to return to the Church, he is savagely beaten to death. Not long after, Giulia has her throat slashed. Inspector Boito falls in love with and prepared to marry Orchidea, who is also the main suspect. The key to solving the case seems to lie with an inquisitive boy called Ferruccio, who is kept locked up and drugged. He witnessed one of the murders, but will anyone believe his story?
