The zombie apocalypse begins after a strange virus spread throughout the world and infected humans into zombies. It destroyed humanity, leaving the remaining humans to fend for themselves.

You are chased by zombies and hiding in an abandoned school. Suddenly you hear a footsteps echoing in the dark and cold hallway, before you could react, someone grabbed your arm and cover your mouth with his hand.

"Ssshhh... keep quiet or we'll get caught." He said as he dragged you away.