1. The Truth Revealed:
It is revealed that the cabin and its surroundings are part of a secret underground facility run by an organization known as the Facility. This organization operates a ritualistic sacrifice system to appease ancient gods and maintain global stability.
2. Dana and Marty Escaping:
The main characters, Dana and Marty, manage to survive and fight their way through the hidden traps and monsters within the cabin. They discover the facility's control room and confront the scientists responsible for orchestrating the events.
3. Breaking the Loop:
Dana learns she is "The Fool" archetype and decides to break the cycle of sacrifices. She releases all other creatures held captive within the tunnels below the cabin. The ensuing chaos leads to several monsters attacking and killing most scientists in the control room.
4. Sacrifice and Chaos:
As ancient and monstrous entities emerge from beneath the facility, it becomes clear that breaking the sacrifice ritual has disastrous consequences. Earth-shaking events unfold outside.
5. Dana and Marty's Fate:
In the final moments, Dana and Marty, having failed to stop the impending apocalypse, share an intimate and emotional embrace as the world descends into chaos. Their fate ultimately remains uncertain as the movie cuts to a shot of the destroyed and transformed landscape, symbolizing the complete breakdown of reality as known.
Ultimately, the ending of "Cabin in the Woods" leaves the audience with a sense of hopelessness and existential dread as the characters become unwitting participants in a grand experiment that spirals out of control.