It's night time in Springfielf and the street walkers have come out for business. This includes Springfield's favorite little walker, Lisa Simpson. He first client tonight is the perverted Dr. Hibbert. He picks up Lisa, pays her and then they head over to the Sleep Eazy Motel. It's an average night for Lisa. A few weeks later, Barney picks up Lisa and they head to his messy apartment. It turns out Barny has some weird kinks, and it was too much for Lisa. She is traumatized by the event.