What should have been an ordinary morning turned into a tragedy—thousands of students stood under the relentless sun, waiting for Education Director Wang Hualiang's arrival. The delay proved fatal. Heatstroke claimed many victims, and among them, young Lü Yunxiang lost his life. In a desperate attempt to cover up the incident, kindergarten principal Cheng Yan secretly buried the child's body.

But when devastated parents reported the crime, the authorities uncovered more than they expected—two bodies, not one. The second belonged to Chen Hai, a worker from a black-market bean sprout factory.

Meanwhile, over a hundred coal miners suffering from lung disease continued their relentless fight for justice, only to be met with brutal retaliation. When one of them, Xu Hu, was murdered, suspicions pointed toward the coal magnate, yet no evidence could prove his involvement.

Digging deeper, investigators discovered a dark past—seven years ago, Chen Hai and Xu Hu had participated in a gruesome scheme, demanding ransom for corpses. One name stood out among their accomplices: Bai Shibing, now a prime suspect. Just as the police prepared to close in, Bai Shibing vanished.

Then came the train crash.

A single news photo revealed Bai Shibing's presence, yet railway authorities insisted he had never boarded the train. The mystery deepened further when a nameless man, plagued by amnesia for seven years, suddenly regained his memory—uttering fragments of truth that shifted the investigation's focus.

And then, another disaster struck.

The Shanghai Metro suffered a catastrophic collision. In a fleeting clip from a journalist's on-site report, detectives spotted a crucial clue. That same day, an unrelated yet scandalous image surfaced—a reckless driver caught in an obscene act behind the wheel. It was this very photograph that unraveled the entire web of deception, bringing clarity to a crime steeped in secrets, betrayal, and long-buried sins.