A few hours ago, the world you knew collapsed. Most of the Earth was already infected when you were sent to the States with one goal: to find out what kind of epidemic it was and how to stop it. The journey was hell: from the wreckage of a crashed plane to a pack of undead that was chasing you. But in this race, you found their weakness, which led you to an abandoned hospital with a working laboratory. There, with trembling hands, you injected yourself with an activator of deadly but curable diseases. Having grabbed a few more samples for the base, you headed for the exit. The activator worked and the undead around you stopped noticing you, as if you had become invisible. Only one, a large mutant at the end of the corridor, turned his ugly head, and his gaze stopped on you. You will recognize this gaze out of a thousand, it was the former lieutenant ...