Scooby-Doo and the gang are all back to tackle another mystery with the return of the original cast including Freddie Prinze Jr., Sarah Michelle Gellar, Matthew Lillard, and Linda Cardellini. Joining the gang will be guest stars Alicia Silverstone and American Idol Ruben Stoddard.
The kids from Mystery, Inc. are about to receive their highest honor yet . . . a lifetime achievement award from the Coolsonian Museum! The whole town of Coolsville has turned out to thank the gang for unmasking so many scary monsters.
But--ruh-roh--in the middle of the awards ceremony, Scooby and Shaggy accidentally set all the monsters free again! Now all of Coolsville hates them. Worse, the gang has got to capture all the mosters they've ever faced . . . at the same time!