In a small town, there was an outstanding young detective named Xiao Yun. There was no case that he could not solve in the entire town, including the entire Yanxiao Island, but he was not omnipotent. In 2000, a group of men in black came to the island. Since then, there has been no peace on the island. Xiao Yun thought he could deal with them. But what he never expected was that no matter how hard he searched, he could not find any clues. Even if he knew it was what they did, there was no evidence at all. In the Spring Festival of 2000 in Hongnian, he was murdered. Fortunately, he traveled through time and did not really die. From then on, he began a long road of exploration.