Sang-woo awakens in hospital and has no memory about the recent years in his life. But it seems he has survived the explosion of his car. Thanks to his wife Yoon-hee, who desperately cares about him, Sang-woo is able to get his life back. But everything feels strange to him, something is wrong with the face in the mirror. Accidently, Sang-woo learns that Yoon-hee had an affair and becomes desperate to find out more about his life before the accident. But at the same time, a mysterious man starts follow all of his step which lead Sang-woo to a terrible truth.