During the day, he is Lin Yan, a useless teacher who can't even throw a piece of chalk in the eyes of students.
Late at night, he is a super detective who makes criminals in the entire city fearful.
Policewoman Su Ting has no choice but to seek help from this mysterious man. The two formed a secret alliance, he was responsible for making plans in the dark, and she was responsible for catching the murderer in the open.
When a perfect murder points to the top brass of the police station, all the evidence is perfect. Lin Yan only said one sentence to Su Ting: "The murderer's flaw was in the 47th second of Jay Chou's "In the Name of the Father."
However, when the truth was revealed, they discovered that the crime itself was actually a demand letter against Lin Yan...
