In midsummer, Qin Qingyu met Gu Kai for the first time. The boy was gentle and cheerful, giving him a feeling of family that he had never had before. He gradually knew that he liked Gu Kai. But Gu Kai suddenly disappeared...
At the age of twenty-four, Qin Qingyu, who became a forensic doctor, met Gu Kai again. The two joined forces to solve mysteries one after another...
But there seems to be something else behind these mysteries...
Purpose: reasoning and criminal investigation