An heiress (Piccolo) fakes her own kidnapping in order to get money from her parents and hides in the river Po's delta among eel fisherman and is helped by a small time smuggler (Toffolo).

Il Bissa is a small poacher and eels are his prays. One day he receives an unexpected visit, it is Vasco, an old friend, who tells him a story about his daughter, her drug addicted friends and the need to hide her in order to save her. Bissa and his friend Lino accepts to take care of her. But when Vasco dies in a car accident the two simpletons discover that Tina, the presumed Vasco's daughter, is actually Margherita Tellini and has been kidnapped. What to do?—Baldinotto da Pistoia