Hyun-suk receives a swap offer from his friend Min-su after a long time. The saying that a new world will open up if only the wife allows it murmurs. After hesitating for a few days, Hyun-suk speaks to his wife Mira. Unexpectedly, Mira agrees and invites Min-su to her house the next day. After dinner, a new world of a novice couple finally opens...