Fred, Daphne, Velma, Shaggy, Scooby-Doo and You travel to an amusement park called Kiss World to see Kiss at their big Halloween concert and solve a mystery, mostly because Daphne has a crush on Starchild, much to Fred's annoyance. However, when the gang arrive, security chief and former government defense employee Delilah Domino refuse to let them in due to unexplained reasons, but they sneak in anyway, only to be caught by Delilah, who bans them from Kiss World under the suspicion of vigilantism. At that moment, Kiss arrives, and after the gang explains they are there to help, they tell Delilah the kids are free to stay, to which she reluctantly agrees, though she does not trust them just because they are amateur detectives. The Demon initially opposes the idea due to Scooby accidentally spraying a water gun on him when he came to Shaggy and Scooby for a surprise visit, but later relents.