A British pharmaceutical company has developed a performance-enhancing drug that the company claims has no side effects. Before launching on the market, the company recruited 30,000 volunteers for clinical trials. Unexpectedly, two months later, the volunteers were in agony, and gradually turned into inhuman bloodthirsty zombies. These zombies bite people everywhere, and the people who are bitten will soon become zombies. This geometric growth quickly caused the entire city to fall. The R&D personnel of the company were horrified. After investigation, only one volunteer named Anna had no medical records, which proved that Anna had immune function. Extracting Anna's serum and quickly developing an antibody vaccine can finally save mankind. Cole is an employee of the company. At this time, he was also bitten and infected. Fortunately, the company has just developed an antidote that can temporarily relieve the attack of the zombie virus. He must find Anna before completely turning into a zombie. At this time, Anna also fled in a hurry with her best friend because of being chased by zombies, and the city was full of crazy zombies. There are zombies intercepting before, and Cole chasing after him. Anna's brother, the policeman Sam, is also worried about Anna's safety and looking for her everywhere. Anna's safety has become the last hope to save the city..