This novel recounts what Zhong Chen saw, heard, and did during his 28 years working behind the scenes in the police force. It portrays a righteous man who quietly serves in an ordinary position, selflessly devotes himself to others, clearly distinguishes love from hate, and stands firm in his principles. It also tells gripping stories of corporate security police protecting mines and coal, and cracking down on theft and robbery, praising the fearless, resourceful corporate security officers represented by Ma Li and Li Qingguo. Their cases prove that those who reach out to steal will always be caught! Through its portrayals of people from different walks of life and their varied fates, the novel tells readers: Good deeds are rewarded, and evil deeds punished. Justice may be late, but it will never be absent! Through stories of Zhong Chen helping Ma Li, saving Jiao Yue, guiding Chang Baogang, and supporting Lin Jinghao, the novel conveys Zhong Da Nei's belief: Once a teacher, always self-disciplined; once a teacher, one bears the responsibility of improving society! This reveals the protagonist's noble ideals as a teacher. By depicting both good and bad squad leaders in the police force, the novel shows that a good family must have an upright head of household; a good workplace must have an honest leader; and a good country must have a principled head of state! Through its depiction of Zhong Chen quietly working in a humble position, the novel shows that even a blade of grass has the promise of spring, and even a firefly gives off light!