Lu Zhiyuan, a wealthy but low-profile man, attends an old friend's wedding incognito. His snobbish classmates look down on him and crop him out of the group photo. He neither argues nor fights back, remaining true to his principles. When faced with false advertising, inferior products sold as quality goods, and unauthorized charges under other people's names, he conducts checks and handles each case according to the rules, helping honest artisans establish themselves through their skills. In the end, the truth comes to light, everyone is held accountable, those who follow the rules earn respect, and opportunists are punished.