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Shaggy and Scooby are frightened by the costumes, despite the fact that they are not alive. Accompanied by the gorgeous news reporter Heather Jasper Howe and other members of the press, the gang enter the museum to open an exhibit which is full of costumes of their former foes from past mysteries.
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Having become celebrities of their hometown of Coolsville, Scooby-Doo, Shaggy, Velma, Daphne and Fred of Mystery Inc., have been invited to the grand opening of the Coolsonian Criminology Museum as the guests of honor, where their screaming fans watch them walk past. Now Coolsville's "most wanted" for all the wrong reasons, they must prove once and for all they really are heroes, by putting an end to the mysterious fiend that's out to get them. have saved the world from certain doom, but that means nothing to their hometown, when a cloaked figure with a vendetta against the gang, brings to life the would-be monsters they unmasked in the past.
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