The zombie virus broke out and the city fell overnight. Ning Fei, an ordinary pharmacy cashier, escaped the initial large-scale infection because he worked the night shift. He understands basic pharmacology and can find truly useful medicines in the ruins; he is calm and pragmatic and will not risk his life for unnecessary kindness. In this doomsday catastrophe, he was called "Number Zero" by the survivors - the first person to walk out of the epidemic area alive. But as time passed, Ning Fei discovered that this disaster was not a natural disaster, but the careful design of a madman. Gu Shen, a defected military scientist, personally released the zombie virus in order to test his "evolution theory." What's even more frightening is that the virus is still mutating, and Gu Shen's experiment is far from over. Ning Fei must use his understanding of drugs and his calm mind to find a glimmer of hope in the trap set by zombies and fanatical scientists. Survival never depends on luck.
