Welcome to the war. The Tesla Institute is a premier academy that trains young time travelers called Rifters. Created by Nicola Tesla, the Institute seeks special individuals who can help preserve the time stream against those who try to alter it. The Hollows is a rogue band of Rifters who tear through time with little care for the consequences. Armed with their own group of lost teens—their only desire to find Tesla and put an end to his corruption of the time stream. Torn between them are Lex and Ember, two Rifters with no memories of their life before joining the time war. When Lex’s girlfriend dies during a mission, the only way he can save her is to retrieve the Dox, a piece of tech which allows Rifters to re-enter their own timeline without collapsing the time stream. But the Dox is hidden deep within the Telsa Institute, which means Lex must go into the enemy camp. It’s there he meets Ember, and the past that was stolen from them both comes flooding back. Now armed with the truth of who they are, Lex and Ember must work together to save the future before the battle for time destroys them both…again.

In a battle for control of the time stream, the past and the future will collide, either saving mankind—or destroying it. Stein has been with the Hollows for as long as she can remember, taken as a child she has no memories of her past—and that’s always been fine by her. Until the day she stumbles across a hidden journal containing the devastating truth about her paternity. Now everything she thought she knew—and everyone she thought she could trust—has changed. The truth about who she is and where she came from is a secret so deep, it will rock the Hollows and the Tesla Institute alike. During a test to verify her bloodlines, Stein makes a terrible discovery. She is carrying a rare genetic mutation that is slowly killing her. Unsure who to turn to and running out of time, she has no choice but to turn to Tesla—her most hated enemy—for help. But can she trust the man who she's been fighting against her whole life, or will she end up another piece in his deadly game of cat and mouse with the people who betrayed her so long ago?

In a battle for control of the time stream, the past and the future will collide, either saving mankind—or destroying it. What should be a routine mission leaves Ethan with a serious problem. He’s fractured, a break between mind and body that leaves him at the mercy of his Rifter abilities, which are quickly tearing him apart. He will have to trust the only person who might know how to fix him, a mysterious Rifter named Stewart Stills, who seems to have a special connection with the time stream. Forced to face his dark past and a decision he may never forgive himself for, he will be trained unlike any of the others, to become a true guardian of time. If he accepts, it will mean leaving everyone he loves behind, if he refuses, time itself could unravel. After a glimpse of the dark future awaiting them all, he will have to choose between destiny and desire. Will he rise up and take his place as a defender of the natural order, or will he watch as all of time burns at the hands of the girl he loves?