"Mysterious Cases" is a humorous, compact and ups and downs urban mystery novel. The story revolves around the members of the "Lin Yixing Detective Agency" who continuously encounter strange mysteries in the city: a missing painter, a headless testimony, a mysterious night detective, a series of secret rooms, etc. In each volume, the team not only solves the current case (high-energy main plot), but also digs into the behind-the-scenes mysteries that have not been solved for many years (main plot undercurrent). Six characters with different personalities continue to collide and grow in order to find out the truth. The book has more than 1 million words, and it progresses step by step. Each volume is independent and interconnected, and finally reveals all the mysteries and brings a warm and healing ending.