sentences:  The events of the film take place during the sixth and final season of "The Grim Adventures of Billy and Mandy".In the future, in a dystopian Endsville, an evil being known as the "Lord of Horror" orders his henchmen to go back in time to eliminate Billy and Mandy and prevent them from reaching a powerful hand-like artifact that the Lord of Horror has in his possession.Billy and Irwin of this time hope their past selves can stop the Lord of Horror's evil plans.