Professor Maldi, a researcher on the company held by Commendatore Tassinetti (Aldo Fabrizi), experiments on various animals, and especially on the capon Gildo, its preparation which should give courage to the men. Pressed by Tassinetti Maldi decides to experiment on himself the latest version of its compound, without waiting to know the reaction of the capon.
Soon, the shy Maldi finds himself desired by every woman he meets: rather than courage, his discovery provides an irresistible fascination for twenty-four hours.
