Dangerous Nan McGrew is the sharp-shooting expert of a traveling medicine show that is stranded in the Canadian northwest at the snowbound hunting lodge of wealthy Mrs. Benson. Nan is invited to put on a show for the benefit of Mrs. Benson's Christmas-Eve guests. While performing her boop-a-doop songs, Eustace Macy, the saxophone-tooting nephew of Mrs. Benson falls in love with Nan. And, then, the villain, the bank-robbing Doc Foster, makes his entrance. Can Dawes of the Royal Mounted be seen slushing in pursuit behind the gangster? Could Be.

A true story about Louis Pasteur, who revolutionized medicine by proving that much disease is caused by microbes, that sanitation is paramount and that at least some diseases can be cured by vaccinations.