Juan is a widowed dad with three children. He was on the verge of ruin, but he inherits a fortune from his uncle, Giancarlo. In exchange, the family will have to take care of Chueco, a chimpanzee who has a big secret: he can talk! Things get complicated when Professor Macarato, an old research partner of his uncle, pays him a visit and tries to steal the ape from him.

Chueco goes to the cinema. Soon, he becomes bored and annoys the audience until he gets kicked out.