A 12-year-old boy named Mully, who has lost his mother, is devastated to discover his father stealing charity money raised in her name. In a desperate act, Mully steals a taxi and is surprised to find a woman, Joy, with a baby in the back seat. Together, they embark on a thrilling adventure across Ireland, committing daring acts such as stealing cars, hitchhiking, taking ferries, and breaking police barriers.