Zoe Tampsin is resourceful, smart and Special Forces-trained, but she has been given an impossible mission. She has to protect scientist, Gavin Shawlens, from assassination by the CIA, and discover the secret trapped in Gavin's mind that the CIA want destroyed. As the pressure to find Shawlens escalates – the CIA send Zoe's former mentor to track her down and her fate seems sealed when he surrounds Zoe and Gavin with a ring of steel. With each hour that passes, the ring is tightened, and the window for discovering Gavin's secret will shut.
Zoe is faced with a decision that goes against all of her survival instincts. If she is wrong – they both die. If she is right – she will discover the secret and become the next target for assassination.