Marco, a nine year old boy, is in love with his elementary teacher, and feels neglected by his workaholic parents. When they forget about his birthday he wishes he could grow up at once. This really happens and Marco begins a new life as an adult. He rents a room in his teacher's flat and she falls in love with him. He even fakes a kidnapping when he runs out of money but he is mistaken for the kidnapper.
Aided by a chauffeur and a butler, a student of humble means pretends to be wealthy in order to attract the romantic interest of a rich girl.
The son of a rich industrialist forces a woman to become his fiancée by threatening to bankrupt her parents — until an unlikely hero steps in.
