Jiwoong falls head over heels for his immediate boss, Kim Sangha, on his first day of work. He yearns for a chance to get closer to Sangha, but learns that he is grieving the loss of his previous partner. One fateful night, Jiwoong drives a drunken Sangha home and experiences a sudden and strange detachment from his own body. How does one cope with the aftermath of having sex with someone while being possessed?