After graduating from the police academy, Lin Yan, a top student at the police academy, joined the city bureau's serious crime team. Under the tutelage of his senior Chen Mo, who had returned from rehabilitation, he began to solve a series of suspenseful cases. From the murder case of a clock in a secret room in an ancient house in the western suburbs, to the murder case of a stage phantom in a drama troupe, to the case of the theft of passwords from ancient books in a museum, every case hides the desires and obsessions of the human heart.
Ten years ago, Chen Mo was wrongfully accused of the Xuan Yubi incident. His daughter Chen Nian was coerced and his best friend died. The man behind the scenes turned out to be his brother Chen Yan. In the process of tracing the truth, Lin Yan accidentally got involved in this obsessional puzzle that spanned ten years. He used the remaining power of Xuan Yubi to uncover the illusion, uncovered the layers of shady secrets of cultural relic smuggling and power protection, and finally rescued Chen Nian and brought justice.
After joining the company, Lin Yan relied on his keen observation and careful reasoning to solve strange cases one after another: the Meridian Bell engraved with cloud and thunder patterns in the ancient house hides the secret of the secret room, the phantom mask on the stage of the drama conceals the truth of love and murder, and the password formula in the ancient book of the Song Dynasty points to the dusty cultural relics hoard. Every case reflects the greed and resentment of human nature, and Lin Yan always adheres to his original intention as a criminal police officer, pursuing the truth in the darkness and solving the mystery in the fog.
