Uncle Cyril (1989)

Sonya is the inheritor to the riches of a Czech noble family - the Hajns. Petr, a social climber marries her, ignoring the shady goings-on, especially an insane uncle who prowls the mansion thinking he is invisible, a peccadilo the family seems to bear with and entertain. The mad uncle stalking every corner of the house, popping out of cupboards and curtains slowly takes its toll on the young bride.