In the year 2150, where time travel is possible but strictly controlled, Avery Caldwell, a skilled time agent, is tasked with protecting the timeline. When a rogue group, the Echoes, begins manipulating the past to alter the future, Avery embarks on a perilous mission to stop them. Alongside a hacker and a historian, Avery faces moral dilemmas, battles through different time periods, and uncovers painful truths about the cost of tampering with time.