Carlo, an industrialist, arrives at his villa in Piacenza to spend the holidays with his wife Piera and his daughter Francesca. Upon arrival, he discovers that the cook - the attractive Zaira, who as a young boy he used to watch having sex and under whose covers he used to crawl during - has been replaced by Doris, a young and busty widow who he has not seen since she was a child. Carlo immediately begins to court and seduce her. After a few days Milo arrives from the South, the son of Carlo's incapable brother. He is a student, young and successful.
First, the boy conquers Francesca, who had an ambiguous relationship with her friend Fedora, then seduces Doris, whom he uses to move Uncle Carlo around, and finally Piera, who, more intelligent than her husband, is about to chase him from home.
After assuring himself of the complete dedication of the three women of the house, Milo pushes the uncle, who suffers from a heart condition, to an excessive effort with the cook, causing him a heart attack. In this way the boy from the South inherits the villa, the factories, and the women.
