When Scooby-Doo and his friends visit Hollywood, they find themselves in the middle of a haunted movie set. As they investigate, they encounter various supernatural creatures and must solve the mystery before it's too late. With their trusty detective skills, the gang unravels the true identity of the villain and saves the day.

Mystery Inc. is summoned to investigate occurrences in a haunted villa, where a black knight terrorizes anybody who tries to get close to treasure hidden by the former owner of the building.

When Scooby-Doo and his friends attend a beach party, they encounter a ghost pirate who is haunting the event. They must uncover the secret passage and solve the mystery to stop the ghost pirate and find the hidden loot.