On Christmas Eve, Hilda prepares for a family trip amid a sudden global cold wave causing cities to freeze. Her 'sister' Erica, a fake heiress, manipulates the situation by claiming to be unwell and demanding to ride separately. Hilda’s fiancé, Paul, surprisingly sides with Erica, urging Hilda to walk a thousand miles instead. Feeling abandoned and betrayed, Hilda is bewildered when three mysterious men suddenly appear, exposing Paul's betrayal and warning her about an imminent apocalyptic blizzard that will trap their car on the highway for days. Faced with a looming disaster, Hilda must decide how to react as the crisis closes in.