Zi O wakes up from losing his consciousness and has no clue where he is. In fact, he isn’t sure who he is either. He just knows that he has a body covered in wounds and there are fallen people all around him. One man walks up to him with a knife in his hands. A year goes by and Gu Reum, a police officer, finds out that the man she was searching for is dead. (Source: Viu)