Codename: No. 7

At two o'clock in the morning, a young man with high fever and convulsions was sent to the emergency room of the Third Municipal Hospital. His body was covered with a purple-red mesh-like rash, his pupils were shrunk to a thin line, and his neck was as stiff as an iron plate. Lin Shen, the attending physician at the Department of Neurology, locked in the diagnosis for two hours - anti-NMDA receptor encephalitis. He started taking medication. The patient woke up, but the rash completely disappeared overnight. Immediately afterwards, body temperature rebounded, manic hallucinations, olfactory aphasia, and the patient suffered cardiac arrest in front of him. Before he died, the patient stuffed a USB flash drive into his hand, moved his lips, and squeezed out two words: "Abyss." Lin Shen opened the USB flash drive and the first line he saw was "Supreme person in charge of the project: Liu Bing" - the deputy dean of the Third Municipal Hospital, the person who smiled at him every day at the end of the morning meeting. Overnight, he went from doctor to prey. After calling the police, the police asked him to hand over the USB flash drive. The shadow who chased him to the hospital knew his home address and his nephew's school. There were test tubes with the "Abyss" number locked in the cold storage under the hospital. Everyone wanted what he had in hand, and he looked through the ward records and found that there was a person who looked exactly like him and prescribed a fatal dose of medicine using his work number. Lin Shen found a top secret file. "Original gene sequence provider: Lin Shen." He was never an orphan in an orphanage. He is the earliest gene donor of the Abyss Project. His blood contains the ultimate antidote to the "Abyss-7" poison. Under the white coat in the hospital, there can be either an angel or a devil, but Lin Shen chose the third identity - the guardian of a test sheet above the abyss.