Seventeen-year-old Gabriel Adam is used to relocating a lot. When a mysterious assassin burns his home to the ground, Gabriel's father reveals the truth of why they are always on the move: Gabriel is one of four archangels, born human and sent to stop Armageddon. Now Gabe must set aside dreams of attending NYU to try to fulfill his newly discovered role. Racing against time, Gabe and his father travel to the English university town of Durham, hoping the last surviving member of an ancient religious sect can guide them. With the assassin in pursuit, Gabe must shoulder the weight of his new life and an impossible destiny as protector of the entire human race.