The story takes place in a prosperous ancient dynasty, with the capital as the background. The heroine is a young painter who makes a living by painting portraits and scenes. She has a delicate mind and strong observation skills. The male protagonist is a young official in the capital's criminal department, responsible for detecting various cases. He is logically rigorous and good at reasoning. The two met because of an accidental case. During the cooperation, they went from strangers to tacit understanding, and their relationship gradually warmed up. In the end, they joined forces to uncover a court conspiracy that had been dormant for many years, maintain the peace of the capital, and gain love. The story has a happy ending and emphasizes friendship, growth and justice.