The Museum of Supernatural History is divided into a number of departments, each of which focuses on a magical, malefic or fantastical area of study. Each haunted antique (hauntique) is a gateway between two worlds. Individuals known as 'sensitives' are the key that can open these gateways. Of course, activating certain artefacts in the collection entails a risk of triggering a catastrophe of apocalyptic proportions. Certain items are equally at home in more than one department.