A Graveyard Ghoul attacks in the middle of Mayor Nettles’ Horror Movie Night, forcing the gang to investigate. However, Fred and Shaggy are smitten with three beautiful girls who have just immigrated to Crystal Cove, and Daphne has eaten some of their mother’s homemade chocolate and become addicted, leaving Velma and Scooby alone to solve the mystery. Eventually, they are forced to turn to Sheriff Stone for help. Meanwhile, after reminiscing about how they met, Mr. E teams back up with Professor Pericles in search of what he calls “the Treasure”. They decide that Cassidy Williams must be put out of the way – “for good”.