With hundreds of cases solved and adventures shared, Scooby and the gang face their biggest, most challenging mystery ever. Discovering that Scooby has a secret legacy and epic destiny, Shaggy remembers how he met the puppy and how Mystery, Inc. was formed.

Seven years after being forced to resign as a New York city police officer, private detective Billy Taggart takes on his toughest case yet when he's hired to follow the mayor's wife. By the time the mayor reveals his true intentions, Taggart's already in too deep, with his freedom and possibly his life, on the line. Taggart will risk it all in a desperate bid to expose the truth and seek redemption in a city where second chances don't come cheap

Seven years after being forced to resign as a New York city police officer, private detective Billy Taggart takes on his toughest case yet when he's hired to follow the mayor's wife. By the time the mayor reveals his true intentions, Taggart's already in too deep, with his freedom and possibly his life, on the line. Taggart will risk it all in a desperate bid to expose the truth and seek redemption in a city where second chances don't come cheap.

"Never Ape an Ape Man": Daphne's uncle is directing a horror movie about an ape man; but a real ape man shows up and wreaks havoc on the set. "That's Monstertainment": Horror host and demon chest escapee Zomba magically transports Scooby and the gang into the film "The Son of the Bride of the Ghost of Frankenstein." Fred, Daphne, Velma, and Shaggy solve a series of mysteries with their Great Dane, Scooby-Doo.