In Norwalk, California, Shaina can't help but yell at just about every car she passes. She doesn't think she has that bad of a road rage problem until her son gives her an ultimatum: seek help, or she can't spend time with her newborn granddaughter. Can Shaina overcome her rage and break the generational cycle of aggressive driving? Meanwhile in Denver, Colorado, Kevin has recovered from one stress-related heart attack, yet fears he's doomed to have another. With an adolescent daughter and a wife depending on him, he knows he needs to change before he dies behind the wheel. Will the scared-straight tactic of a retired state trooper be enough to fix his behavior for good?