Jackie is a divorced mother of two. Isabel is the career minded girlfriend of Jackie’s ex-husband Luke, forced into the role of unwelcome stepmother to their children. But when Jackie discovers she is ill, both women realise they must put aside their differences to find a common ground and celebrate life to the fullest, while they have the chance.

A woman, Tome, is born to a lower class family in Japan in 1918. The title refers to an insect, repeating its mistakes, as in an infinite circle. Imamura, with this metaphor, introduces the life of Tome, who keeps trying to change her poor life.