Guo Xiaowei, a grassroots youth, wins 50 million in the lottery and becomes mentally impaired after being attacked. In front of their mother's mourning hall, his sister Guo Xiaohong, who has been separated from him for twenty years, recognizes him. To monopolize their parents' property, the eldest sister and second sister push Guo Xiaowei to Guo Xiaohong to raise. Guo Xiaohong withstands the pressure and cares for him meticulously. At the one-year-old banquet, Guo Xiaowei takes out one million in cash to support his sister's standing, gets framed by relatives calling the police, and recovers his sanity after the cash is detained. Grateful for the kindness, he quietly buys a large flat for his sister, uses the mother-child buckle token to reunite with Tian Mengxin, a wealthy heiress he saved in childhood. The two join hands to expose the eldest and second sisters, pass the Tian family's test to get married, and live a stable life with Guo Xiaohong's family.