Dr. Sam Frizell (Riley) is trying to make a go of it as a single father to his troubled teenage daughter, Ariel (Bennett). As she isolates herself, withdrawing from friends her own age, Ariel's close relationship with her father begins to border on an unhealthy co-dependence. When Sam finally makes the decision to try dating again, Ariel begins to spin out of control. Sam begins seeing Mary, a gentle woman who finds that she has become the victim of Ariel’s anger and violence. Although Mary would rather avoid any conflict, her sister Julie, who is the undefeated topless female boxing champ of Vancouver, decides to step in and teach Ariel a few lessons.