When Passaguai family patriarch Giuseppe (Fabrizi) decides to take advantage of a corporate discount to bring his wife (Ninchi) and children to spend a Sunday at the beach of Fiumicino, a series of troubles begins for everyone, in the form of a comic nightmare.

To get ahead after he answers a newspaper ad for a business proposition, Passaguai borrows the more impressive apartment of a retired actor and arranges an elaborate luncheon there.

The Passaguai family is living peacefully, but then they go to see the magician Bhorman, starting a series of problem for them.