Three years after being released from Camp Green Lake, Armpit is trying hard to keep his life on track, but when his old pal X-Ray shows up with a tempting plan to make some easy money scalping concert tickets, Armpit reluctantly goes along.

Twelve-year-old Jonathan Grisby has been sent to the Slabhenge Reformatory School for Troubled Boys, a former lunatic asylum which is currently run by a sadist who enjoys punishing the boys and setting them against each other; but when a lightning strike kills all the adults the boys find themselves suddenly free--and trapped on Scar Island which seems to be sinking into the ocean.