Scooby and Shaggy are flattered beyond belief when they are invited to attend the Mystery Solvers of the Millennium Awards.  They soon find themselves surrounded by the greatest detectives in modern history and feel decidedly outclassed. When the other detectives start mysteriously disappearing, Scooby and Shaggy face a simple choice — run away to safety or stay and solve the crime--proving themselves worthy of the award. They choose to stay and eventually discover that the mysterious host of the awards (and the culprit of the kidnappings) is none other than their archnemesis, Dr. Phineus Phibes! Using nothing more than brains (and a super strength Scooby Snack) Scooby and Shaggy defeat Phibes, rescue the other detectives and manage to become "Mystery Solvers of the Millennium."