The young Luca grew up with his uncle Augusto, owner of a shoe store. The latter, determined to "start" the clumsy nephew sexually, takes him to a brothel in Florence and throws him into the arms of the stupendous prostitute Nerina, of whom Luca falls hopelessly in love.

Four corrupted fascist libertines round up 9 teenage boys and girls and subject them to 120 days of sadistic physical, mental and sexual torture.