Three years ago, a live broadcast software called "Black Lion" appeared out of thin air. The live broadcast content was mainly about killings. This put huge pressure on the Shenzhen police. Cheng Bei, who had just joined the criminal police detachment, worked hard to solve the case but made no progress. After the account with the ID "Black Lion" broadcast a live broadcast of the murder of the "Black Lion founder", the Black Lion software disappeared. It wasn't until the "Black Lion" live broadcast reappeared three years later that it broke the superficial calm of Shenzhen City. Chen Tong, a family member of the victim of the Black Lion case, joined the Shenzhen Criminal Police Detachment with his talent in the computer field and worked hand in hand with Cheng Bei to solve the case. As the murders were broadcast live one after another, Cheng Bei and Chen Tong relied on their extraordinary investigative capabilities and superb computer skills to finally surface the murderer behind the case, and the dark network lurking underground in the deep city was also peeled away layer by layer. Chen Tong's missing eldest sister reappears in the world, and the murder of the second sister is avenged. The relationship between him and Cheng Bei also becomes indestructible as they go through life and death, and mutual trust becomes indestructible. In the end, the revenge is avenged, the misunderstanding is solved, and the two finally break through many obstacles and come together.
Purpose: To reveal the complexity of human nature, the coexistence of love and evil to demonstrate human nature