The movie begins in Southern England in the Middle Ages and then six knights are seen riding in horses towards a destroyed town. They see the remains of burned buildings and dead people until they come upon a mother and her dead baby. She quickly dies and then a rhino-sized dragon flies overhead, the knights follow right behind, vowing to kill the creature.

After enrolling in an experimental study on Rage Impulse Disorder at the Straun Foundation, Michael Dare discovers that the research is not what it seems. After learning that the Foundation's head, Dr. Timothy Straun has his own agenda for them, Dare and head resident Dr. Susan Verger team up to stop him. Straun's shocking family secret and twisted plan are then revealed in a stunning finale.

In a sleepy mountain town, Cindy witnesses the murder of her parents by a blood-thirsty green figure in a red Santa suit. Twenty years later, the Christmas-hating monster begins to terrorize the town once more. Cindy finds new purpose in stopping the creature and saving the holiday.