On a cold Christmas night, a young man ducks into a large building looking for somewhere warm to wait. He steps into an elevator. It malfunctions. The doors do not open. As his eyes adjust to the near darkness, he realizes he is not alone—a young woman is trapped in there with him. Getting out is the immediate problem. But confined to a small space with no way to leave, the two begin, slowly, to learn who the other person actually is.