The 13 Ghosts of Scooby Doo was a short-running, successful series about the adventures of Scooby Doo, Daphne, Shaggy and Scrappy Doo, a team of "ghostbusters" who had to catch 13 ghosts which Shaggy and Scooby released when they were tricked to open the "Chest of Demons" by 2 ghosts. The ghosts are causing disasters all around the world and they have to put them back in the chest before things get even worse.
The gang is joined by the great Vincent Van Ghoul and a boy named Flim-Flam. They are constantly annoyed by 2 ghosts called Weerd and Bogel. These 2 ghosts will do almost everything to prevent the gang from catching the ghosts. Fortunately, these ghosts are a bit dumb!
The gang appears on the "Boris Kreepoff's Show". While they were there, Bogel and Weerd, with the help of a lion demon called Zimbulu turned off all the lights and the Chest of Demons disappeared. Unfortunately, the gang realizes that Bogel, Weerd and Zimbulu didn't steal the chest. Now, they have to find the thief before he releases all the demons again.