A group of young people head off on a vacation. When the car breaks down they're forced to find help. In the woods they find a house and some angry dogs which were by their car too. They decide to enter the house and that's where all the madness begins.

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.