Criminal police captain Lin Tao investigates the murder of businessman Wang Zhiqiang and becomes a partner with new forensic doctor Gu Chen. The clues of the case pointed directly to Lin Tao himself, but Gu Chen relied on his extraordinary observation skills to clear his suspicion and pointed out that the real murderer was left-handed. As the investigation deepened, the case became related to the "7.14 Mining disaster" that killed 16 people twenty years ago. Gu Chen came to find out the truth about his uncle's unjust death, while Lin Tao discovered that his father, whom he had always admired, might be involved. A key medal becomes the key to unlocking all secrets. In the process of chasing the murderer, the two encountered many obstacles and deadly murderous intentions from the mastermind Li Zhenguo. From the explosion in the mine to the confrontation in the club, in the test of life and death, the initial use and estrangement gradually turned into an inseparable trust and protection. In the end, the truth was revealed, the crime was brought to justice, and the two scarred souls found a faint possibility of light on the ruins.
This is not only a story about solving a crime, but also a profound discussion about justice, guilt, forgiveness and how to move forward side by side in the darkness.
