In Italy, Sandra, a university student is visiting a museum in a castle with her class led by their professor architect Lorenzo. She distracts and finds locked alone into the castle and soon she stumbles upon Lorenzo. Out of the blue, they spend the night having sex in different positions. In the morning, she learns that he has the key and they could have left the castle. Soon she accuses him of rape and sues him. He is sentenced guilt and sent to prison. The prosecutor for the trial Giovanni is not capable to give orgasm to his wife Monica and visits Lorenzo in the prison to learn how to proceed to give pleasure and satisfy his woman.