Na Na is a twenty-six year old killer for hire. She neither cares for nor loves anything but she is a true professional. Her only dream is to go to China. But she will never be the same again when a certain young man becomes obsessed with her. His love succeeds in annihilating her memory and identity forever. Jo Han is a cartoonist who falls for Na Na instantly. He proceeds to pursue her relentlessly. He lives in a world of his own - selfish and isolated. To keep Na Na to himself, he slips a memory-loss capsule in her drink.