Caught up in the rave of the ultimate high school party, eighteen-year-old Sarah Cain finds herself outside at 3:10am with her high school crush. Together they witness a violent explosion that tears through the sky. Knocked unconscious, Sarah awakens to a world she no longer recognizes. The sun does not rise, there is no moon or stars, and black rain falls heavily on her shoulders. Forced into survival, Sarah is frequented with strange words and dreams that mystically draw her toward a mountain promising life, even amidst her dying world. Setting out on foot to follow this vision, Sarah meets up with other survivors and discovers that some of them have shared her same dream. Together the group sets off to find The Mountain. Tempted by good and evil at every turn, survivors must decide which path to take.