Bothered to realize they are next-door neighbors and share a psychiatrist, a man and a woman find it's impossible to stay out of each other's way.
On a rainy day, Lee Min Kyung and Noh Hwi Oh experience a series of increasingly unpleasant encounters, unaware they live next door to each other.
At the police station, Min Kyung and Hwi Oh go at each other's throats. Later, Hwi Oh is advised to stay away from people who trigger his anger.
Bumping into an old coworker dredges up painful memories for Min Kyung. With a flasher on the loose, Hwi Oh is roped into patrolling the neighbourhood.
Min Kyung is determined to find her missing dog. Getting wind of drug dealing activity on a chatting app, Hwi Oh sets out on an undercover mission.
The flasher resurfaces, this time in front of Min Kyung, but thankfully Hwi Oh is close by. The next day, she asks him for a favour.
Hwi Oh trains Min Kyung in the basics of self-defense. But soon, Min Kyung's anxiety returns in full force with the arrival of a sudden piece of mail.
