While travelling, Scooby and the gang are lost in a swamp. Fred then says Shaggy to look for a sign for directions but once he looks back, Shaggy discoveres that a swamp monster is after them. Everyone realizes that a swamp monster is after them, so Fred speeds up the Mystry Machine. But the Mystry Machine is so fast that Fred couldn't stop when the road comes to an end with a swamp, it gets stuck in mud. Then the gang sees a mysterious ghost pirate ship, but are not sure if they really saw it. The situation worsens as the swamp monster approaches the gang but when it comes too close, they realize its a van and the Harlem Globtrotters are in it.