Scooby-Doo! and the Haunted Castle

Scooby and his friends find themselves in a millionaire's castle for dinner when a ghostly apparition plunges the room into darkness. Can they uncover the truth behind the haunting, or will the specter remain a mystery? As fear grips the guests, the gang must unravel the secrets hidden within the castle's walls before it's too late. What sinister forces are at play, and who—or what—is behind the ghostly encounter?