It tells the story of Ouyang Mingjing and Xingqi who met in an accidental case and became good friends. It didn't take long for Xingqi to discover that Ouyang Mingjing had strong observation and logical reasoning abilities and a wide range of hobbies. He had an interesting coffee shop, and at the same time, there were often some mysterious visitors coming in and out. Until one day, they were involved in a murder dispute...
