Photojournalist Frank West is heli-dropped into the Willamette Parkview mall, following a tip-off that there’s something sinister going down in the sleepy Colorado town. Impressively undeterred by the sight of people eating each other by a school bus during his fly-by, he instructs his pilot to drop him off on the mall roof and return for him in exactly three days. The rest, more or less, is up to you. If you decide to do absolutely nothing but lounge around…