Voices (1973)

After her young son accidentally drowns, a woman has a breakdown and is finally placed in a mental hospital. After her release, her husband takes her for a weekend at a secluded country mansion, hoping to help her recover. However, things at the mansion aren t quite what they seem to be, the couple begin to feel an uneasy and oppressive presence, and the mother starts to see things that may, or may not, be hallucinations.