Six girls decide to spend the bachelorette party of one of them in a remote medieval castle in the Sudetenland. Thirsty for sensation, they eagerly listen to a bloody legend related to the history of the castle, which is told by a quirky caretaker. What they don't know is that the story is not a contrived fairy tale, but a description of events that took place here hundreds of years ago, the consequences of which continue to this day. They will have to face powers they had no idea existed.