While trying to solve the mystery of a sea creature who is haunting a lighthouse, Shaggy complains to Scooby about how Fred, Daphne and Velma are always bribing them to be monster bait with Scooby Snacks. Because of this, Shaggy and Scooby decide not to eat Scooby Snacks again. After they have solved the mystery, the gang goes to the malt shop where Shaggy and Scooby eat tons of hamburgers that were supposed to be for a hamburger eating contest and win the whole gang a trip to Hollywood. Once they arrive there, Fred decides they should visit Brickton Studios, an old monster movie making studio that is about to be closed down. One of the studio's employees Junior welcomes them and offers to give them a tour. Joining them on the tour is Atticus Fink, a developer who wants to buy the studio and bulldoze it down. During the tour, they drive their truck through a dark room, causing Mr. Fink to leave. After Fink leaves, the Headless Horseman appears and chases the gang. After they escape, they go to see Chet Brickton, the manager, about their encounter. Mr. Brickton tells them that all the monsters used to be played by an actor named Boris Karnak, who died years ago and that his ghost may have come back to haunt the studios through various costumes of the monsters he played. In addition to the Headless Horseman, there have also been sightings of a mummy and a zombie, which is why he must sell the studio to Mr. Fink. The gang offers to help Mr. Brickton solve the mystery. First, the gang goes to the set of the movie the studio is currently working on, which is a romantic comedy, not a horror film, which Junior is not happy with. Suddenly the Headless Horseman attacks the set and ruins it, making Mr. Brickton forlorn. The gang offers to help him finish the movie. Mr. Brickton makes Fred the director and makes Shaggy the star. However, Mr. Brickton lets TV show talk host Drella Diabolique have the lead, to Daphne's dismay. Daphne is sad that she doesn't have a leadi