Speed Demon (2026)

The rebellious novice nun Sister Lu struggles with her faith and considers leaving the Church. Her mentor, exorcist Father Novak takes her on a high-speed train traveling from Montreal to New York.

During the journey, a passenger unknowingly releases the ancient demon Asmodeus, which possesses him. The possessed passenger kills the conductor, destroys the train's controls, and the train accelerates out of control. Meanwhile Sister Lu acquaints herself with a few passengers in the train, including a smart young child and her nanny, a young couple, a petty thief and a grumpy old man. Supernatural events consume each carriage. Father Novak realizes that the demon is using fear and despair to strengthen its influence, making conventional exorcism methods increasingly ineffective. Sister Lu is forced to confront both the demon and her own doubts. She then finds Novak severely wounded and dead, leaving Sister Lu to continue the ritual alone.

Guided by Novak's teachings and her renewed faith, Sister Lu performs a full exorcism against Asmodeus in the locomotive. The ritual weakens the demon long enough for the surviving passengers to separate its host from the entity. Asmodeus is ultimately banished, allowing the train's emergency systems to engage and preventing a catastrophic derailment.

Following the incident, the Vatican officially recognizes Sister Lu as an exorcist after she successfully completed her first independent exorcism. In a mid-credits scene, Vatican officials investigate evidence suggesting that the demonic outbreak was part of a larger supernatural conspiracy, hinting at future confrontations between the Church and forces of evil.