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。
Park Hae-il
Yoon-young
Moon So-ri
Song-hyeon
Jung Jin-young
Mr. Lee
Park So-dam
Ju-eun
Dong Bang-woo
Yoon-young's Father
Moon Sook
Restaurant Owner
Lee Mi-sook
Head of the Dental Clinic
Kim Hee-jung
Helper
Yoon Je-moon
Song-hyeon's Ex-husband
Jung Eun-chae
Cafe Owner
Han Ye-ri
Pharmacist
Kwon Tae-won
Yoon-young's Father's Junior
Bek Hyun-jin
Speaker
Kim Jong-jae
Protester
