300,000 years from now, human spirits called Phelastians are finally making peace with ape-like creatures called Dwellers. Formality requires that a twenty-first century Earthling be present as witness to the treaty. A Phelastian travels back in time and recruits Whitmore Middle School’s newest student, Jamie Richards. When a Dweller overlord sabotages the celestial link connecting Jamie to her own world, she vanishes from the signing, crumbling the negotiations, and sending her on a series of mind-bending, alternate-reality adventures. Every time Jamie Richards falls asleep, she’s bounced through time and injected into possible futures. And all of these diverse futures lead to one horrifying conclusion; the end of everything. Can Jamie save trillions of lives, prevent a war that has already occurred, and stop herself from meeting her self, all while attempting to stabilize creation and find her way home?