Zhang Guihua, a retired quality inspector, accidentally activates the Justice System while exposing supermarket owner Qian Duoduo for selling expired food. She gains the power to make her words come true, using villains' own twisted logic against them and forcing them to suffer the consequences of their actions. From then on, she takes on one wrongdoer after another: Sun Hao, an arrogant car owner who blocks fire lanes; a dishonest property management company that embezzles maintenance fees; restaurant owner Zhou Qiang, who sells spoiled ingredients; Chen Ping, a dog lover who allows pets to disrupt public order; Wang Hao, a workplace director who overworks employees until one suffers a stroke; and Zhao Kai, a landlord who deliberately makes life difficult for food delivery workers. By turning the villains' own absurd arguments against them, she fights for justice on behalf of ordinary people.