Knife of Ice (1972) - IMDb
Knife of Ice: Directed by Umberto Lenzi. With Carroll Baker, Alan Scott, Evelyn Stewart, Eduardo Fajardo. As a thirteen year old, Martha Caldwell witnessed the death of her parents in a terrible railway accident. Barely surviving the tragedy herself, Martha was struck dumb due to the shock. Now an adult, the still mute Martha lives with her uncle Ralph in the Spanish countryside.