A series of explosions occurred late at night in the city, leaving only charred residue at the scene, and people were panicking. The calm and rational forensic doctor {Shen Yan} can accurately determine the type of bomb from the minute explosion residue, but due to past psychological trauma, he is particularly sensitive to bombings; the journalist {Lu Shi} who is persistent in justice goes deep into the crime scene to find out the truth and digs out the hidden story behind the case.
The two met while investigating a case, and Shen Yan provided professional evidence clues to track the murderer's whereabouts, from an abandoned factory to a residential area, step by step closer to the truth. As the investigation deepened, they discovered that the murderer {Gao Ming} was retaliating against society because of his unsatisfactory work, and was even involved in old cases from many years ago. In the process of chasing the murderer, Shen Yan gradually came out of his psychological shadow, and Lu Shi also insisted on journalistic justice, and finally joined forces to bring the murderer to justice and restore peace to the city.
