No exit

A kidnapped little girl locked in a stranger's van. No help for miles. What would you do? Darby Thorne is a college student stranded by a blizzard at a highway rest stop in the middle of nowhere. She's on the way home to see her sick mother. She'll have to spend the night in the rest stop with four complete strangers. Then she stumbles across a little girl locked inside one of their parked cars. There is no cell phone reception no telephone no way out because of the snow and she doesn't know which one of the other travelers is the kidnapper.