Deep in the city, there are carefully planned criminal mysteries hidden. Chen Guodong, captain of the Serious Crime Squadron, is a meticulous and generous police elite. He leads his team through every corner of the city and engages in battles of intelligence and courage with highly intelligent criminals. These cases may seem unrelated, but they hide a shocking truth. Every case is like a well-arranged puzzle, with twists and turns catching people off guard. And Li Mingyuan relied on his keen intuition and rigorous reasoning to gradually uncover the truth hidden in the darkness. This is a game between justice and evil, as well as a battle between human nature and desire. Every detail may be a key, every sentence may be a clue, and the truth is often hidden in the most inconspicuous places.