A relentless femme fatale who had been left for dead sets out for revenge against her brother and the Banished Brawlers, his gang of gearheads. Katherine Harlow reemerges as Doris and goes on a search for her own crew, The Monster Ring, channeling her past to get members with some unusual persuasion. After Doris puts her plans into motion, the Monster Ring prepares to take the fight to the Brawlers. The group is forced to switch gears after the Brawlers zero-in on the Monster Ring.