Every family has its secrets. When Kyle Wells and his friends take an annual trip to his family's cabin deep in the Rocky Mountains, a string of events unravel to expose what his family has kept hidden for decades. As an unexpected blizzard pounds the mountains, a friend begins to act different and seems a bit off after a strange encounter in the woods. In their rush for safety, mysterious beings known as Exalls, follow them back to the city where further chaos erupts. Finding himself in the midst of a battle against evil, Kyle learns of a disturbing truth kept secret by his own grandmother, Susan. He and his close circle of friends turn to her as their last hope of survival.