Eighteen year old hot rod enthusiast Harold Norton, who helps his mother at the motel they own, has fallen under the spell of one of their guests, Omaha-based singer Lynn Novak, who is waiting for her musical combo comprised of Al Kutner and Phil Davis and their business manager Woody Wilson to arrive from Omaha so that they can look for performing gigs in the area. That musical life is only a front as they are a gang of robbers, they, with the addition of an inside person, planning an armored truck robbery, the plan including being far from the scene at their hideout before the authorities even know that a crime has been committed. The girl of Woody the leader, Lynn discovers upon the arrival of Al and Phil that sociopathic Al, who fancies Lynn himself, has taken over the operation in a double cross that has put Woody behind bars back in Omaha. Al also figures that they could use the unwitting assistance of Harold as their getaway driver in his souped up car. Things don't go quite according to plan as Harold, Lynn, Al and Phil end up at the mountaintop cabin owned by the electrical company with brother and sister Luther and Terry Dolgin, who are the caretakers of the cabin for the winter as they do research for the company, they collectively snowed-in until the Dolgins are scheduled to be relieved of their duty at the end of winter in five months' time. In their isolation and snowed-in captivity at the cabin, it becomes a battle of wits between the robbers on one side and the Dolgins and Harold on the other, the latter group who may have one advantage in Lynn, Al, and Phil looking out more for their individual selves than them as a gang.