As a people's policeman, An Xin regards protecting the safety of the people and peace as his lifelong mission.Because of his low self-esteem and kindness as an orphan, he accidentally helped Gao Qiqiang, who was bullied by market bullies, but became a tool for the other party to pretend to be powerful and gradually fall into the abyss of power.An Xin also relies on her inner pursuit of justice, sticks to her original intention in the wandering of black and white, fights the evil forces to the end, and gradually grows into a truly good policeman.