Stan's jealous of the friendship that has developed between Kyle and Tolkien, so Cartman decides to do something about it; Clyde and Scott pitch a movie idea to Kyle.
Barry creates a map book to guide him and Iris throughout their future in order to keep her safe, but the results are not what he expected, and instead, they relive the same day over and over again. Joe has a heart-to-heart with Cecile. A new big bad is introduced to Team Flash and friends and foes, old and new, begin to descend upon Central City.