Grace was ready to let her past go... Until Ethan receives a letter that leaves them diving into Hart's past. As his history is unveiled the two find themselves again fighting for their freedom, unaware of the lives that hang in the balance. When the trail leads them to an abandoned Carnival, the truth begins to unfold. Even with the aid of Agents King and Chung, time is running out. Racing against the clock, Ethan searches through his past for the answer to a question he isn't willing to ask. Will he be the hero, or will the timer hit zero?