An outlaw gang has kidnapped the Colorado and Eastern train, leaving the passengers afoot in a winter blizzard. Tango and Ned Chambers, the men hired to prevent such things from happening, are left alone on the frozen prairie with a wealthy widow and a brother of the US vice-president. Now all they have to do is recover the train, get through to Denver and bring to justice those responsible for the outrage, without allowing harm to come to their charges ...