The game starts the player on a vast, hostile planet after what it seems like a failed colony attempt, with debris and burning, abandoned stuff all around. The player's calendar shows "SOL 216" so it has been some time, but they have no recollection of what happened here or how it happened.
After the failure of civilization on the surface, the player finds that some people are trying to survive as raiders, ambushing the player. And some, in an inexplicable way, are slowly turning into zombies. The daylight on the planet is deadly; moving around during the day causes sickness and increased resource drain to stay alive, but during the day, raiders go underground; the only threat is slow moving but never ending zombies.
