Lu Cheng died unexpectedly after becoming the chief of security and was reborn back to 1975. Relying on the memory of his previous life, he first got rid of the entanglement of green tea and saved his railway job. After becoming a police officer, Lucheng relied on his quick wit and past life memories to get rid of the conventional case-handling methods of this era. Using the experience and methods of handling cases in later generations, Lucheng first cracked the theft gang that gave the director of the General Bureau a headache, and then caught the enemy agents who were trying to steal confidential information. He repeatedly solved the case using unconventional methods, making the leaders of the Railway Bureau both love and hate him. By solving cases again and again, Lu Cheng made meritorious service many times and was quickly promoted. He was also hailed as a model for national education and became an instant celebrity. After that, he went to the countryside to visit his elder brother Lu Feng. Through the memories of his previous life in the countryside, he helped Lu Feng avoid danger time and time again, solved the people who opposed Lu Feng in the countryside, and helped him become the captain, completely changing the fate of his family. Later, Lu Cheng helped his second sister seize the dividends of the times and quickly accumulated funds, allowing the whole family to live a better life that was completely different from their previous life.
