Tsuneo is a university student working part-time in a mah-jong parlour. Lately the customers have been talking about an old lady who pushes a baby carriage through the streets. They say she is carrying something for a crime syndicate, and they wonder what it is she has in the carriage... Money? Drugs? One day, the owner of the mah-jong parlour sends Tsuneo out to walk his dog. A baby carriage comes rolling down a hill and crashes into a guard rail. The old lady asks him to look into the carriage, where he finds a young woman clutching a knife. This is how Tsuneo first meets the girl who calls herself Josée. Her real name is Kumiko, and she is unable to walk, so her grandmother takes her out early every morning in the old baby carriage. To thank Tsuneo for his help, they offer him breakfast, and he begins to fall under the spell of the young woman's unusual charm. Kumiko has named herself after the heroine of a novel by Françoise Sagan, and Tsuneo comes to call this strange girl by that name. He grows more and more attracted to her.