A man who loathes ghosts, Kim Gi-Tae, one day gets sexually harassed by a naked ghost in the bustling subway. "If you agree to my conditions, I'll chase away the ghosts that cling to you. So in exchange, do it with me..." What is this ghost saying? But... If I lend this ghost my body, will it be possible for me to live a normal life? Gi-Tae gathers his courage and decides to participate in a trade with the ghost in order to free himself from the ghosts that badger him, but...