Dawn Miller, a moving truck driver on a cross-country haul, pulls into an isolated state park to get some sleep when she is frightened by a shadowy figure. The figure reveals itself to be Phoebe Beenum, a young woman who claims to have just escaped a kidnapper. Dawn is wary of Phoebe's story, leading to a struggle that leaves the only cell phone broken, the keys missing, and nothing but miles of cold and darkness between the women and help.