Scooby-Doo, Shaggy, Fred, Daphne, and Velma were invited to investigate a haunted mansion. They were told that strange noises and ghostly apparitions had been seen there.
After some detective work, the gang discovered that the "hauntings" were actually being caused by a group of thieves trying to steal a valuable artifact from the mansion.
"Zoinks!" Scooby-Doo exclaimed as he ran away from the villain.