When a genetically enhanced Guinea pig threatens the lives of the Justice League, Krypto the Superdog, Superman’s loyal pet, teams up with a group of shelter animals who have recently come into super‐powers to help save the day.

Fleeing from his father, Irish 12-year-old Mully steals a taxi and is shocked to find a woman, Joy, in the back seat with a baby. Joy has decided to give her child away to a friend, and Mully needs to get some distance from his debt-ridden dad, who's after the cash Mully has with him. And so two lovable rougues, a complicated middle aged mother and a troubled adolescent, go on a journey across Ireland, gradually finding the friendship, love and learning they never knew they needed in each other.