Objective: Survive the night.
The group's vehicle has broken down (reason unspecified). Several attacks by lone opponents (unintelligent). These attacks serve to attract the attention of more opponents. The attacks begin to become more planned and intelligent--ambushes, traps, etc.
A light to the northeast promises rescue--an "abandoned" vacation ranch, generator still running.
The group must survive progressively larger attacks.
In searching for cover, a "hole" is discovered in the cellar; there is no upstairs. The hole leads to a chamber containing the antagonist and three guarding opponents.
Adventure ends with the elimination of one or both sides.