Jane Harrison is a young woman traumatized by the violent murder of her mother during her childhood and a recent car accident that resulted in a miscarriage. Struggling with vivid nightmares and psychological distress, Jane finds little comfort in her conventional therapy sessions or in the reassurances from her boyfriend, Richard, and her sister, Barbara. Her condition worsens, leading her to seek alternative forms of help. A new neighbor, Mary, suggests that Jane join a secretive black magic cult, which promises her peace through dark and unorthodox rituals.

As Jane becomes entwined in the cult's sinister practices, she finds herself constantly haunted by visions of a blue-eyed man who seems to follow her everywhere. The border between reality and nightmare blurs, causing Jane to question her sanity and her grasp on the truth. Her attempts to pull away from the cult's influence are met with increasing hostility, escalating her paranoia and fear. As Jane delves deeper into this mysterious world, she faces a harrowing journey that threatens not only her mind but her very life.