Robert (Locke Hudson Rock Hudson) is a billionaire. Every September, he regularly comes to his villa in Italy, where he lives his beautiful mistress Lisa (Genna Lauro Brigida Gina Lollobrigida). They will be inseparable for a month and share a sweet time. In fact, Lisa has long been unable to stand this relationship, but this year, Robert came to Italy ahead of time, and under his rhetoric, Lisa believed him again. Robert's unexpected arrival caught the butler Morse (Walter Slezak Walter Slezak) by surprise because he rented out his villa privately in order to earn extra money, which means that before September, Robert and Lisa must be forced to share a room with a group of noisy young schoolgirls.