Morimura Tomomi is a housewife scorned by her husband and two sons, and yet she continues to protect the family. On her 46th birthday, she leaves home in disgust and embarks on a 1,200 km journey. It is Tomomi’s first time driving onto the highway and she speeds along to the west. On the road, she encounters a series of traumatising episodes. She detects her husband’s affair, is faced with a truck driver who mistakes her for a prostitute housewife, and finally her car gets stolen. While Tomomi is at a loss, a good-looking young man and an elderly person give her a ride, and she arrives in Nagasaki. As she meets various people in this town which was once transformed into a wasteland because of the atomic bomb, she becomes aware of a “wilderness” within her and starts to explore the path to rebirth

全职家庭主妇森村朋美（铃木京香 饰）为家人操劳半生，可是却痛苦的发现，她付出的越多，失去的便越多。年近半百，芳华不再，朋美落寞地迎来了46岁的生日。怎奈次子优太（滨田龙臣 饰）临时有事未能露面，丈夫浩光（杉本哲太 饰）也自高自大，对妻子的生日漠不关心，更以尖刻的言语伤害着无私奉献的伴侣。朋美感受到前所未有的失望，于是她毅然离家出走。前方路漫漫，而且全然没有任何计划与目的。常年圈在家里的主妇，外面的世界宛如一个全然陌生的国度。她与陌生人们相遇、告别，体验着从未有过的精彩人生……

46歳の誕生日｡祝いの言葉一つもない夫や息子たちに別れを告げて､専業主婦･朋美はひとりで家を出る｡はじめて乗る高速道路で一路西へ｡次々に降りかかる災難、謎を抱えた人々と出会い、1200kmの旅路の果てに朋美が見るのは荒野か？それとも…。

무심한 남편과 제멋대로인 아들들을 뒤로 하고 집을 나와, 무작정 서쪽으로 달리며 여러 가지 사건과 사람들을 마주하게 되면서 자신을 찾아가는 46세 주부의 이야기