The girl Ke Nan has her own "incident constitution". No matter where she goes from childhood to adulthood, there are always bizarre cases following her. In an unexpected incident, she reunited with Jiang Xia, an old acquaintance from college, who easily solved her dilemma in just five minutes. From then on, the two hit it off and started a light detective life that bid farewell to horror and bloodshed and focused on easy puzzle solving. They used gentleness and tacit understanding to solve the big and small mysteries in life.
