In a school bullying incident ten years ago, silence became the complicity of everyone.
Ten years later, a series of serial murders occurred, and repentance was a salvation that was too late.
Lu Xun, a gold medal detective in the city bureau, took over a bizarre serial murder case. The victims were all participants in a school bullying incident ten years ago. At each crime scene, a twisted symbol is left, pointing directly to the dusty and criminal past.
As the investigation deepened, all the evidence vaguely pointed to Lu Xun's high school classmate and the one he felt the biggest guilt in his life - Su Nian. The former victim is now a calm and wise psychiatrist. Facing Lu Xun's questioning, she had a vague sarcasm on her lips: "Officer Lu, you are so brave in pursuing the truth now."
On the one hand, there is the iron-clad professional rationality, and on the other hand, there is the burning guilt buried deep in my heart. Lu Xun trudged through the fog, only to discover that the real culprit might be someone else. And Su Nian, the psychiatrist who seemed to be staying out of the situation, had already understood everything, but chose to remain silent.
When the final kidnapping occurred, in the abandoned school building, the real murderer pointed his gun at Su Nian and at Lu Xun's soul: "Choose, police officer. Do you want to repeat the bystander behavior of the past, or become a new murderer?"
Crime and punishment, cowardice and courage, hatred and forgiveness that spanned ten years have come to an end at this moment. When the truth was revealed, people discovered that the deepest abyss was not at the scene, but in the human heart that had never healed.
