Doppelgangers are monsters, hardwired for murder. They are not supposed to have doubts, but this one does. He wishes he could be different. More human, maybe. But even that can't stop him from killing people so he can take their places and live their lives. He has to do it; it's who he is. But when the doppelganger murders a small-town teenager, assumes his shape, and takes over his life, he's shocked by the world he steps into.