Nine-year-old Sophie catches JJ, a hardened CIA operative, spying on her family during a routine surveillance operation. In exchange for not blowing his cover, JJ begrudgingly agrees to show the precocious girl how to become a spy. What at first seems like an easy task soon turns into a battle of wits as Sophie proves you don't need much experience to outsmart a seasoned agent.
At birth the Black Widow (aka Natasha Romanova) is given to the KGB, which grooms her to become its ultimate operative. When the U.S.S.R. breaks up, the government tries to kill her as the action moves to present-day New York, where she is a freelance operative.
Scooby and the gang face their most challenging mystery ever: a plot to unleash the ghost dog Cerberus upon the world. As they race to stop this dogpocalypse, the gang discovers that Scooby has an epic destiny greater than anyone imagined.