In the third year of the apocalypse, Su Nian found the last dose of vaccine formula in the morgue of the abandoned hospital. When the news leaked out, survivors, armed gangs and remnants of the old government swarmed in and scrambled frantically. But Su Nian lit a match in front of everyone and burned the formula to ashes. Lu Zheng put the muzzle of his gun against the back of her head and asked her why. Su Nian only said four words: "Vaccines kill people." Burning the formula was just the beginning - the antibodies in her body were the real trump card, and behind this doomsday, there was a conspiracy more terrifying than the virus.