Shen Yanshan, chairman of Qiyun Health, feigns illness to secretly investigate the power-seizure conspiracy between his wife Luo Manqing and Zhou Qifeng. Maintenance worker Chen Fang intersects with him while investigating community safety hazards, and is actually Shen Yanshan's biological son who has been separated for 28 years. Back then, Luo Manqing intercepted letters and framed them, causing Lin Qiuhe and her son to live a displaced life. Chen Fang teams up with his father to expose dark operations such as the misappropriation of advance payments and counterfeit goods exploiting subsidies, and the villains set fire to destroy evidence. After going through hardships, Shen Yanshan finally sells his family property to bottom out and clear the debts, and Chen Fang gives up his inheritance to return to frontline safety supervision.