The most famous gang of pets and detectives faces a new challenge when a mysterious villain begins to bring to life the monsters they had previously captured. Velma, Daphne, Fred, Shaggy, and of course, the unparalleled Scooby-Doo, find themselves in a mess when the Coolsville Mystery Museum hosts a grand exhibition dedicated to their old adventures and the monsters they had dismantled. But what should be a day of celebration turns into a true nightmare when villains from the past start coming to life, wreaking havoc and confusion in the city.
As the gang investigates, they discover that someone is behind it all and that their own legacy is in danger. With humor, jokes, and a good dose of craziness, Scooby and his friends must join forces once again, solving puzzles and escaping monstrous dangers while trying to uncover who's behind this madness. With the help of new allies and old connections, the gang attempts to stop the mysterious villain and restore peace to Coolsville. The story is filled with unexpected twists, funny moments, and of course, those classic scares that the franchise fans know so well. On this wild ride, the friends will prove that no matter how big the monster, there will always be room for friendship and bravery.