Four unhappy wives who were suffering from sexually ill life in their daily living environment. On the same day, they are drawn to a strange fate and ride on the same train at the same time. The strong misfortunes of the four and the aura of the erotic roost change the air in the car, transforming the passengers into an evil group. There is no common sense or morality in this "Otaru train" where chaotic desires and pleasures swirl around.