Irwin, Hoss Delgado, Jeff the Spider, Fred Fredburger, and General Skarr from the “Grim Adventures of Billy and Mandy” team up to fight an evil candy army from the Underworld…

The Spider Queen wants to take revenge on Grim for denying her the rightful place as the Ripper.

When the Boogey Man causes Grim to lose his powers, rank, and title in the Underworld Court for misusing his powers, he plots to seek out Horror’s Hand and take…