When the only way to save his mother's life lies with the lemurs he made extinct five years ago, Artemis turns to his fairy friends to take him back in time, where he tries to undo the damage while avoiding his dangerous younger self.
FBI agent Chevie Savano escapes into the past to elude the secret police after they kill Charles Smart just as he is telling her of the WARP program, and she and Riley team up to find Colonel Clayton Box before he can launch missles at the capitals of Europe.