Waking up without memory in the hospital, Kim Taehyung does not know where to go, what to do or how to do. Faces that claim to be friends, family, and of course his wife, Yoon Hye, God! How could he not remember her? Everyone now becomes unfamiliar. But what happened? An accident? A fight? A disagreement? How he came to the hospital is an issue that even doctors can not tell. And upon arriving at his home for the first time, after gaining discharge, and finding a weapon on his mute set, he begins to suspect that his memory loss may not have been a complete accident. How much can you forget?