Worlds collide when Billy accidentally steps into the Delightful Children's Delightfulization chamber with Grim's scythe and emerges as a hideous cross between himself, Grim, and the Delightful Children! Soon, the KND are called in to stop this Delightful Reaper's rampage across the country as it grows bigger and bigger, adding more and more children to itself to make the perfect child! With the KND leadership in a shambles, Mandy takes over the organization to fight this creature -- but may have ulterior motives in commanding her own army!