While at a paranormal convention, the gang is chased by the evil Reflector Spectre and his henchmen, Weerd & Bogel.

Zomba, the host of the "Spine Tingler Movie", is one of the escaped demons who sweeps the gang into their TV, where they are trapped in an old Frankenstein movie.

Scooby's nerves are frazzled so the gang goes on a cruise. Unfortunately, their travel agent is one of the thirteen ghouls, and he sends the gang on a trip into the Bermuda Triangle.