Mayumi runs away from home from to escape her predatory stepfather only to be abducted by members of a delinquent motorcycle gang. She's taken under the wing by Noriko, who invites her to move into her apartment, finds her a job in a service station and introduces her to the world of motorcycling. The two set up their own all-female gang - Eight Angels - but soon discover that local male-dominated gangs are hostile to this intrusion on their turf.