Three homeless people--Gin, a former professional bicycle racer; Hana, a transvestite; and Miyuki, a runaway young girl--are living together in Shinjuku, Tokyo. On Christmas Eve, the three discover a baby girl at a garbage dump. They head for the brighter parts of the city where people are enjoying holiday festivities, looking for the baby's parents. Their encounters with various people result in adventures that force each of the trio to confront his or her own life, which they've almost thrown away.