After a freak accident, a nursery school janitor finds out he can now understand babyspeak.

Angelo is a forty-year-old messy man, nice but a bit of a scoundrel. He makes a living by selling fake paintings to rich Japanese on holiday, until one day he is unmasked and to escape the police who are hunting him he takes the first flight to an unknown destination. As luck would have it, the first plane he can catch takes him to Los Angeles. Having arrived in California penniless and with his credit cards blocked, he gets by for a few days as a bum when suddenly he comes up with a brilliant idea. Angelo, in fact, reads in a newspaper that the rich Italian-American entrepreneur Vittorio Di Spirito has died leaving a boundless inheritance to his son George, and he cannot help but notice that the dead rich man looks like his father in every way. Thanks to this resemblance, Angelo shows up at the funeral, staging a dramatic and heartfelt condolence, and then shows up at George's villa declaring that he is his brother...