Two weeks prior, Grim is sued for dereliction of duty and misuse of his abilities by his old rival, the Boogey Man, the former having failed to reap General Skarr (who had accidentally created a hole in his chest) thanks to an intervention from Billy and Mandy. Grim and the children (including Irwin) are set to be exiled by the Underworld Court and placed in the custody of Boogey, with Grim being stripped of his job and powers and Numbuh 3 of "" as his court-appointed replacement. Boogey reveals it was part of his plan to steal Horror's Hand, an artifact capable of bringing people's deepest fears to life and transforming anyone who conquers their fear into the scariest and most powerful being in existence; Boogey himself believes that with its power, children will fear him again. The group eventually escapes and plans to obtain the hand for themselves for various reasons (Grim believes it will get him his job back, Mandy sees it as the way to conquer the world, Irwin thinks it will help him win Mandy's heart and Billy just wants to use it to get a candy bar).