Eleven-year-old Milton Fauster puts aside his own escape plans to help his sister, Marlo, who is in training to be an underworld secretary, and his best friend, Virgil, who is stuck in the circle of Heck reserved for overweight children.
Formerly dead Milton Fauster tries to save his older sister Marlo from "eternal darnation" when she is sent to another educational level of the Underworld reform school known as Heck.
When timid Milton and his older, scofflaw sister Marlo die in a marshmallow bear explosion at Grizzly Mall, they are sent to Heck, an otherworldly reform school from which they are determined to escape.
Cody Mack's misdeeds land him in a reformatory school, where he soon discovers that the principal and teachers are actual monsters with a sinister plan to alter the boys' brains.
