After the Simpsons leave a school talent show, we discover that Marge is a very passive driver. Homer sees the Canyonero and decides to buy the SUV for himself. He soon discovers that it is an SUV designed for soccer moms. He quits driving it and Marge starts using it. It is the perfect automobile for her and she becomes more aggressive behind the wheel. She gets pulled over for road rage and has to go to traffic school. Her problems are more extensive than the other students and she gets into trouble again. Marge's driver's license is revoked. Meanwhile, Homer has taken Bart and Lisa to the zoo. When the rhinos begin stampeding, they become trapped. At Chief Wiggum's request, Marge comes to the rescue using the power of her SUV and road rage to save the day, ultimately at the cost of her Canyonero.