Bravo, My Life! opens in October 1979 with the news of President Park Chung-hee's assassination. But for 14-year-old Gwang-ho, it is more importantly his first day at junior high, where the kids are interested in football and brawling. Gwang-ho's mother, Mal-soon, whose husband is working in Saudi Arabia, devotes everything to her children. Despite a nagging illness, Mal-soon wears heavy make-up as she sells cosmetics door-to-door. Meanwhile, as his sexual awareness increases, Gwang-ho turns his attention and affection to their pretty neighbor Eun-sook, an assistant nurse who is the complete opposite of Gwang-ho's mother. One day, Gwang-ho receives a "good-luck letter." The letter states that unless he immediately writes and sends the same letter to someone else, he will be faced with bad luck. He starts sending it to people around him, but as those people start vanishing, Gwang-ho is racked with guilt, suspecting the letter of luck is the cause of their disappearance.