Mark Sills, 16, found the car on Craigslist --the ad read RUNS GOOD -NO REVERSE. He buys the car and, along with his pal Fred, decides to fix it up, but he doesn't have much experience. Oh, Mark once oiled the chain on his bike and Fred added a quart of oil to his Dad's car, but that was about it. A car with no reverse soon finds Mark in trouble with his girlfriend, her mom and his school's Vice Principal. He finds some new friends too -- an ex-Marine junkyard owner and an old lady named Agnes. The title describes the car, and also the boys --and a girl named Karen.