This edition of the Scooby-Doo franchise is based in the small town of Crystal Cove, a place with a long history of ghost sightings, demons, phantoms and other paranormal activity. As teenagers in a small tourist town known as Crystal Cove the sleuthing team of Fred, Daphne, Velma, Shaggy and Scooby-Doo attempt to solve mysteries about the town despite discouragement from other townspeople.
Fred's favorite adventurer, Rick Spartan, has come to town to take over the school's biology class. But Rick is not alone. He is being haunted by The Headless Creature - a monster from the Amazon who believes Rick has taken his head.
After the Mayor purchases a haunted temple off the Internet, Crystal Cove's only theme park - Creepy Spooky Terror Land - is besieged by a Manticore, an ancient beast with the body of a dragon, the face of a man and the tail of a scorpion.
Velma is feeling like a fifth wheel. Fred has Daphne, and Shaggy has Scooby. Who does she have? So, when a mysterious "Mer-woman" named Amy contacts Velma on her blog, she decides that maybe this will be her special friend.
Shaggy and Scooby win a dinner date with their hero, Vincent Van Ghoul. What they don't realize is that they are unwitting participants in Van Ghoul's new reality television show where he has dinner with people, then scares them out of their wits.
After an exchange student named MAI LEE shows up in town to stay with Velma, strange Kung Fu wizards begin attacking the town trying to get her. Turns out Mai Lee has a RING they are after.