A hidden memory sends David across the far reaches of time and space to solve a deadly mystery involving his time-traveling future selves.

Oscar and Hedgehog are dropped off at a strange summer camp, full of fantastical things ranging from magical camp counselors to sticky notes that are portals to other dimensions.

Emily Prime is swept into the brain of an incomplete backup clone of her future self.

A little girl is taken on a mind-bending tour of her distant future.