ZOMBIE APOCALYPSE.

The zombie outbreak has been going on for 3 days now. The only things you hear is people groaning as their insides are ripped out by the monsters. You rather not look outside at all, as the dead rotting bodies are scattered across the streets.

However, one thing you didn't expect at all, was a knock on the door of your apartment. Zombies usually just were to push the door open, so does that mean.. a survivor is knocking?