Wan Jinyou (played by Guo Jinan) is the only son of "Mahjong Master" Wanshu (played by Xia Yu). He has inherited his father's mahjong skills and is a good candidate to inherit his father's gambling business. Yitong (played by Yuan Qiu) is Wan Jinyou's godmother. She has always regarded Jinyou as her own son and loves him very much. But on the night of Queye's birthday, Queye, who came back from Las Vegas, also brought his new wife Ersuo (played by Liu Weiqi). Jinyou and Yitong both felt that Ersuo was plotting something wrong. It turned out that she teamed up with Queye's nemesis Baopeng to occupy all of Queye's industries. Jinyou was deliberately allowed to meet the extremely unlucky Wu Liang (played by Yeung Siqi), which caused Jinyou's luck to plummet, and he always got bad cards when playing cards. Fortunately, Jinyou learned to be optimistic. When his luck was about to come back, his girlfriend was held hostage by Baopeng...