When the Primm family (Constance Wu, Scoot McNairy, Winslow Fegley) move to New York, young son Josh struggles to adjust to his new school and new friends. Everything changes when he discovers Lyle, a singing crocodile who loves baths, caviar, great music and who lives in the attic of his new home. The two quickly become friends, but when Lyle’s existence is threatened by the evil neighbor Mr. Grumps (Brett Gelman), the Primms must team up with Lyle’s charismatic owner, Hector P. Valenti (Javier Bardem), to prove to the world that one can find a family even in the most unexpected situations and that there is nothing wrong with a great singing crocodile with an even greater personality.