Doug dresses up as a hero named Race Canyon. When a spooky new amusement ride, Blood Stone Manor, opens up at Funkytown on Halloween night, Skeeter wants to check it out instead of trick-or-treating. Doug reluctantly agrees to go, but when the park closes before their turn comes up, Roger convinces them to go on the ride anyway. Once on the ride, Roger scares Doug and Skeeter big time, so it is up to them to scare Roger back.