Derrick saves Stefania before she is thrown off a ledge, and uses an elevator to take him deep into the silos, allowing him to reach Gianni's squad in a timely manner. Derrick defeats Solus, saves Alex and destroys Nexus, ending the T'lan threat. Derrick and Alex escape from Site Zero as it collapses. In a helicopter above the site with Stefania and Gianni, Alex questions the future; since she is still alive, the future has been divided into two separate timelines. As the pendulum effect begins to throw Alex into the future she jumps out of the helicopter to avoid dragging the others with her. Derrick has a choice: remaining in his own time or following her to destroy Nexus in her timeline. If Derrick chooses to go with Alex, they both go to an unknown future. If Derrick chooses to stay in the past, then, after the ending credits, a message from Dr. Ogawa appears saying that Alex has died alone.