Chen Li used to be a criminal police officer. After losing his leg, he changed his career as an investigator, specializing in taking cases that the police did not file and lawyers did not dare to touch. A girl was scolded by hundreds of thousands of people as a "mistress" and jumped off a building. Her sister came to Chen Li and said that her sister was wronged. Chen Li investigated and found that behind the revelations there was a trader who treated cyber violence as a business. He took money to do things and had quotations. An old man living alone spent all his savings to buy more than 100,000 yuan in health care products. Chen Li went undercover into the company and found a list of "silent customers". Those old people were tacitly approved by their children or even actively promoted the trap. A young man jumped from the top floor of his company. Three days before his death, he sent evidence of bullying to all managers. Thirty-seven people received it, but no one reached out. In the three cases, the murderer did not use a knife, but used a keyboard to kill people, used contracts to deceive people, and used silence to force people to death. Chen Li only has one thing to do: find evidence. If you find the evidence, you can be held accountable.