Everyone on the old street knows Chen Yan, the young man who runs a fortune-telling stall. He may seem carefree and unserious, but he learned the art of reading people and understanding situations from his grandfather. When someone pays a hefty price to ward off disaster, he exposes the scam on the spot. When someone is deceived by false appearances and too afraid to go home, he sees through the human-made trap behind it. From disputes among ordinary folk to mysteries surrounding old cases, he is repeatedly thrust into the spotlight. Following one clue after another, he eventually discovers that behind all the strange incidents lies an old web of secrets that has entangled people for years. With his own skills, Chen Yan dispels the fog and protects the people who matter most to him.