Josh, a young son of the Primm family, finds it difficult to fit in at his new school and with his new friends after they relocate to New York City. When he learns that Lyle, a singing crocodile who enjoys baths, caviar, and wonderful music, is residing in the attic of his new house, all of that changes. But when Mr. Grumps, a bad neighbor, threatens Lyle's existence, the Primms must join together to demonstrate to the world that family can come from the most unexpected places.