Killer Nun

Set inside a Catholic hospital for the elderly run by a convent, the building and its wards frame the story's tension between care, authority, and hidden sins. The long corridors, patient rooms, and a chapel-like atmosphere create a claustrophobic stage for Gertrude's double life. The setting emphasizes the clash between religious duty and human fragility, anchoring the psychological horror.

⛪ Faith

A nun's vocation defines Gertrude's outward role while her inner life spirals into addiction and violence. The hospital’s religious authority magnifies questions of sin, guilt, and redemption. Faith here is both a source of solace and a mask that conceals psychological rot. The film uses religious imagery to heighten moral tension around her actions.

🪞 Duality

Gertrude leads a double life, moving between cloistered duty and city lurid encounters. The narrative plays with perception, leaving viewers unsure whether the murders stem from Gertrude's hand or from her drug haze. The revelation reframes everything, challenging initial judgments about guilt. The hospital setting intensifies the sense of a fractured identity under pressure.

💊 Addiction

Morphine and heroin misuse blur boundaries between healing and harm. The drug dependency drives Gertrude into increasingly unstable behavior and detaches her from reality. Dependency escalates the sense of danger, affecting her judgment and the fate of patients. The plot uses addiction to explore how vulnerability can erode moral boundaries.

🔪 Murder

A string of violent acts punctuates the hospital drama, with Janet's brutal stabbing heightening the sense of danger in the wards. The murders are shown through shifting perspectives, inviting doubt about who is truly responsible. The twists reframe the events as driven by hidden motivations beyond a single culprit. The finale challenges what viewers accepted as truth.

💔 Trauma

Sister Mathieu's history of childhood abuse emerges as a driving force behind the violence, reframing the killer's motive. The film treats trauma as a powerful factor shaping loyalty, sexuality, and survival. The relationship between Mathieu and Gertrude exposes survivor guilt and moral ambiguity. The resolution redirects blame toward a deeper wound rather than a straightforward villain.