Ethan, an advertising designer in Brooklyn, begins to share pain and pleasure with his new neighbor Liam for no reason. Gifted with empathic abilities, Liam is regarded as an outcast and has secretly stalked and obsessed over Ethan for ten years. Though Ethan struggles to resist and escape, he finds only Liam can make him feel truly alive. Their dynamic completely reverses, trapping them in mutual entanglement. This fated bond is, from the very start, a mutual devotion between two born madmen.