When Fonzie wins the $100,000 grand prize in a contest, his life suddenly becomes very complicated. He solves his problem by donating $50,000 to Panama State Park and $49,980 to establish the Arthur Fonzarelli College of Mechanical Knowledge. He keeps $20 for a new comb and a night on the town.; Actress Dora Lake is coming to speak to the school's drama department, and Richie is in charge of the Speaker's Bureau. After spending so much time together in public, the tabloids claim that Dora has dumped her boyfriend, Lance Edwards, for Richie. Lance comes to town to get his girlfriend back.; Marion asks Fonzie for his help. Howard will turn 50 in one more day, and he is feeling very old. The next day, Fonzie throws a surprise party for Howard at Arnold's. Howard receives the attention of many young girls, making him feel young again.; After Joanie is crowned prom queen, she becomes very popular. When a make-out artist, Phil, starts dating Joanie, Fonzie and Richie come up with a plan to show her his true colors.