As a child, Janet (Jennie Linden, Old Dracula) witnessed an unbearable horror – her insane mother stabbing her father to death. Now a young woman, Janet suffers from recurring nightmares that have her convinced that she'll follow her mother to the asylum. Accompanied by her schoolteacher, Miss Lewis (Brenda Bruce, Peeping Tom), Janet retreats to the home of her guardian (David Knight, The Devil's Agent), who has hired lovely Grace (Moira Redmond, A Shot In The Dark) as a companion to help calm his troubled ward. But Janet's nightly terrors, magnified by the eerie, creaky old house, bring all her fears chillingly to life. Are Janet's problems all in her head ... or is there a sinister force at work?