Before the outbreak of the biochemical crisis, the zombie virus had not spread among humans; At first, the virus is in birds began to spread.

Over the weekend holiday, people are relaxing on the park lawn, enjoying the good times of the holiday, when suddenly the sky is dark and swarms of zombie birds gather like clouds. Zombie bird crazy attacked people, people are caught off guard, horrified scatter, were you just wait to die, in such a way that escape is useless, or bravely pick up the weapon at hand, fight for survival.