A post-apocalyptic wasteland setting, two people are trudging along, alone, they find a third person, unconscious? Manage to revive him/her, who is aware of events only prior to apocalypse, the two begin to explain what has happened: Zombie outbreak? Famine, plague, extra-terrestrial invasion?
They are quickly interrupted by a hostile being: infected human, alien, resource-seeking ruffian, crazed gunman? The hostile encounter is disposed of using a large club/shovel. The trio agree to move to a safer location.
Edit: Successful idea is successful -w00t-
