Helen receives an order for six paintings of winter scenes. Margy receives permission from Miss Pepper for the girls to spend a vacation at Elk Lodge so that Helen can complete her paintings. The girls are thrust into a mystery as soon as they arrive. Someone has been staying at the lodge without permission! The intruder returns to steal most of the girls' food provisions and cuts the phone lines so that they are isolated from the outside world. The situation turns desperate after a deadly blizzard begins, leaving the girls snowbound. It is only with great courage that the girls find a means of survival and unclench themselves from the grip of certain death.