Das Geisterhaus [The Haunted House]

When showing an old house, a real estate agents shouldn't give to much about the rumours concerning the property, should they? Sure, the house has been on the market for a few years now and no-one wanted to buy it. But that can't be due to the gory tale going around, right? Apparently, the former owners vanished without a trace. But experienced real estate agents do not take stories like that for granted. Until they are in the house and the door slams shut... So what now? Better leave this mysterious house. If you can, that is.