It has been a few years since the Twisted Virus outbreak happened, at first It wasn't a trouble to Drones, but then When the while humanity was infected, the Zombies started killing Worker Drones, the remained Worker Drones hidded in a búnker, behind three doors, with no defense, they only beign in there, always lighted slightly by orange-yellow lights, but they didn't know that there were going to be a new kind of drones that would protect them...