The game Zombie Trigger takes place in the near future, namely in 2015, when the world began unexplainable outbreaks of a virus turns people into different types of blood-thirsty mutants. Their only goal - to destroy and infect all who have not yet been exposed. In this regard, humanity begins to move to the fortified city-fortress with high walls and well-trained advocates of the invasion. A special role is played by the so-called "hunters", their task - it is all special missions in the territories abandoned by the people, especially the destruction of dangerous monsters, as well as conducting investigations to find the root causes of the disaster.

In the role of one of them and we will go on a trip to the most terrible place, and what will result in a new mission, nobody knows.