Welcome to the time war.
In a battle for control of the time stream, the past and the future will collide, either saving mankind—or destroying it.
The Tesla Institute stands on one side of the battle. Controlled by the mind of one of the greatest inventors in history, the Institute recruits gifted, young time travelers called Rifters. Those who survive his training are sent into history with the mission to preserve the time stream, recruit more of their kind, and better humanity through subtle, controlled event manipulation.
Standing in the way are the Hollows, a rogue group of Rifters who have vowed to put an end to the Tesla Institute—at all costs. They steal, cheat, and bend history to their own ends. Using children stolen from time as their personal armies, they fight not only for control of time itself, but also for self-preservation.