Jennifer, an Australian girl on the run from her past, turns up in Amsterdam and, in a desperate attempt to blend in, joins a coach-load of tourists on a tour of Holland's old windmills. When the bus breaks down in the middle of nowhere, she and the other tourists are forced to seek shelter in a disused shed beside a sinister windmill where a devil-worshiping miller once ground the bones of locals instead of grain. As members of the group start to disappear, Jennifer learns that they all have something in common – a shared secret that seems to mark them all for doom.
This movie contains 16 potentially triggering events.
Several characters accuse a mentally ill person of being violent specifically due to being off of their medication, but she is not the cause of the violence in question. However, *SPOILER* it is revealed in flashbacks that the mentally ill character murdered her abusive father, though it is not never attributed to her mental illness.
Takashi thinks he sees a dog, but it's walking.