允英喜欢前辈的妻子颂贤。允英知道颂贤离婚的事实后,两人冲动地一起去群山旅游。两人寄宿的民宿主人,一个中年男子,和患自闭症不出门的女儿一起生活。4个人在群山发生错综复杂的爱情。Yoon-yeong has been harboring feelings for Song-hyeon, a friend's wife. When he finds out that she is divorced, Yoon-yeong and Song-hyeon take a trip to Gunsan on a whim. They find lodging at an inn where the middle-aged owner lives with his autistic daughter who does not leave her room. The four become star-crossed lovers in the city of Gunsan.