Pipì, Pupù and Rosemary are getting increasingly hungry and are looking all over the place for something to eat. During their search, however, Pupù is attacked by a toothless lion which swallows him in one gulp. To try and help their little friend, Rosemary and Pipì throw themselves onto the lion kicking and beating him, but when this proves a fruitless tactics, they decide to come to an agreement: Rosemary and Pipì will make him a new set of teeth on the condition that the lion release Pupù.
The ferocious animal accepts but, once he has his new teeth and released little Pupù, he flings himself upon our little friends with the intention of eating all three. Soon, however, the lion has to abandon his undertaking since Pipì, Pupù and Rosemary run off and prove much too fast for the old and tired lion.