War widow Reiko rebuilds and runs the grocery shop in the house of her husband's family. Many years later, their business is threatened by a newly built supermarket and Reiko's in-laws plan to convert their small shop into a supermarket, to her detriment.

A married Japanese forester during WWII is sent to Indochina to manage forests. He meets a young Japanese typist and promises to leave his wife. He doesn't and after the war, she turns up and the affair resumes.

Keiko, whom everyone calls Mama, narrates her story: she's a hostess on the Ginza, 30, a widow. She describes life's vicious cycle: acting cheerful around drunks, dressing and living well to convey confidence, needing money for these expenses and for her demanding mother and brother, and knowing she's growing older.