Alex Sullivan is a normal kid. He goes to school, has a job working at his parent's restaurant, and struggles to fit in. Then one day when he goes in for a routine medical procedure his life changes; tests show he has biology inside of him that the doctors have never seen before. They don't know what it is. They just know that it's not human. Agents from a shadowy government organization appear at the hospital, and after Alex escapes he goes on the run to try to find out who he really is and uncover the shocking history that his parents have kept hidden from him. With the help of a nurse from the hospital, they begin to learn the secrets of his past and ultimately what their futures will be in this fast-paced thriller that explores what it really means to be human.