Artemis Fowl is a 12-year-old genius and descendant of a long line of criminal masterminds. He soon finds himself in an epic battle against a race of powerful underground fairies who may be behind his father's disappearance.

When dysfunctional adult Al Clancy mistakenly agrees to mind his smart-ass 10-year-old nephew Karl for a week, his job and home are placed in jeopardy. In a bold bid to save Al’s job, they steal his mam’s camper van, become best friends, and embark on a criss cross adventure, putting up posters all over Ireland. When things go wrong and the lads get cranky, one of them realises that the other one needs to grow up.