Homer sees a Canyonero deftly maneuver through some post-Faculty Talent Show traffic at Springfield Elementary and decides to get one himself. The next day, Homer finds out that his F-Series Canyonero is traditionally thought of as a woman’s car and gives it to Marge. Marge is initially wary of the hulking sports-utility vehicle, but it quickly transforms her into a tough, aggressive driver. After illegally cutting around a funeral procession, Marge is sent to traffic school by Chief Wiggum.

Marge’s class teaches her how to deal with her road rage. But on her way out of the parking lot, she becomes annoyed with how slowly people are pulling out and decides to bully her way through. Nearly causing an accident, she crashes into a prison fence, allowing an escape. Her license is revoked.

Homer, Bart, and Lisa take a trip to the Wild Animal Kingdom and Homer enables the rhinos to break free. They go on a rampage in the parking lot. Unable to do anything, the police ask Marge to use her Canyonero to round up the rhinos. Marge refuses until she sees Homer, Bart, and Lisa on top of the car surrounded by rhinos. Marge rescues her family using the Canyonero, but winds up destroying the vehicle in the process.