In 1959, a college student, Matt, is contacted by his cousin who was presumed killed during the Korean War. His cousin invites him to spend the winter break at his parents' remote lodge in northern Minnesota. Matt persuades two friends to join him and together, they drive to the lodge in a blinding blizzard. On arrival they are shocked to find a horror scene at the lodge. Matt's two friends and the owner of the lodge disappear after a confrontation with Matt's cousin, but Matt escapes. Matt is subsequently arrested and accused of murdering the occupants of the lodge including his two friends, his aunt and uncle. No evidence is found to convict Matt; however, he remains a person of interest and is restricted by the court to reside in a small town nearby. Years later, the lodge is acquired by a computer programmer and his friend, but on their initial visit to the property, they encounter several strange and frightening incidents that prompt them to investigate the history of the lodge. They find an article that details Matt's account of the 1959 incident and set out to locate him in the small local town. After they locate Matt and compare notes, they discover that Matt's cousin disappeared in northern Alaska. They then set out to locate the site of his cousin's disappearance. After an arduous trip into the Brooks Range Mountains of northern Alaska, they are captured and find themselves in a large subterranean city.