A genius mathematician with the ability to remember every detail she sees, Dr. Maria Martinez—Subject 375—has finally escaped the covert Project Callidus group that's been controlling her since birth.

But her escape only intensifies the Project's need to retrieve their subject. The powers at the very top of the organization will stop at nothing to ensure that she fulfills the mission she was born to complete.

Maria soon realizes, despite the distance she puts between herself and her pursuers, that she can trust no one and that there's no way to hide and stay safe forever. Can she trust herself enough to stop running and right the path of her own destiny—even if that means returning to the very people she has fought so hard to escape?