In a small Tokyo apartment, twelve-year-old Akira must care for his younger siblings after their mother leaves them and shows no sign of returning.

Four women, who have their own different sorrows, embark on a road trip. They look back at their past and restart their lives... Jinko (Aoi Miyazaki) and Motoko (Sakura Ando) have been friends since their university days. One day, they hear a rumor about their former classmate and friend Miki (Kazue Fukiishi). The rumor is that Miki ran into the sea, but got out safely. Jinko and Motoko decide to visit Miki to see if she is OK. In addition, Haraki (Shiori Kutsuna), who Jinko met at the library where she works, joins their trip as a driver. Their one night and two days road trip begins.

After the Great Kanto earthquake in 1923, a troupe of female sumo wrestlers arrive in Tokyo.