Knife of Ice

In the Spanish countryside of 1972, Martha Caldwell (Carroll Baker) lives in near silence. She has not spoken since her parents died, and she is brought home to a house shared with her cousin. Umberto Lenzi sets a killer loose in the surrounding villages, and when the cousin is murdered, the suspicion lands on the people closest to Martha. She cannot call out or name anyone, and the person watching her may be somebody she trusts.