There's a feeling of relief that comes just after you've robbed a bank...
Rex's parents have split up and, to make matters worse, he has to spend his summer holiday on a remote and rainy Irish island - with only unruly sheep for company. The only upside: he'll be staying with his strange and brilliant Uncle Derm.

Then Rex discovers Uncle Derm is about to execute his most hair-brained plan yet . . . To rob the island's travelling bank! Like the local legend of medieval Pirate Queen Grace O'Malley, Uncle Derm plans to redistribute the money to local needy causes on the island. And he needs Rex's help...