In Rush's action-packed debut, 18-year-old Anna Mason has lead a life ruled by secrecy. Her father works for the Branch, a clandestine organization and his project is to monitor and administer treatments to four gorgeous genetically altered boys who live in the lab below their farmhouse. Although she is attached to all the boys, it is Sam Anna sneaks down to see at night. When the Branch shows up to end the project, Sam masterminds their escape and takes Anna with them. In the desperate race to find answers before the Branch agents find them, Anna clings to what she knows is true: her love for Sam.