Dark Haven.

Trapped inside an abandoned building by an unimaginable horror, young Eleanor is desperate to survive. But she quickly discovers she is not alone. A dark, brooding Stranger demands that Eleanor leave his hard-won sanctuary. Determined to remain safe, Eleanor cajoles the Stranger into playing emotionally brutal games for the limited amounts of water and food. Outside the walls of their dark haven, a bloodthirsty demon waits impatiently. Inside, Eleanor and the Stranger face hunger, thirst, and certain death. Who, if anyone, will survive?