Cassandra forms part of the four-part Firewall project, exploring the concept of doors.

Typically doors are viewed as human inventions. However they precede and transcend the human world. Not only do they appear in the natural world, amongst animals and insects, but they are also found in the physical world of the atmosphere. It is the interrelationship between their human and non-human occurrence that is the focus of Firewall. The term Firewall characterises one function of a door, namely its immunological qualities, keeping danger at bay while protecting the contents. It explores this through an imaginary descent from heights of the atmosphere through a layer of doors down to ground level.

Cassandra explores the concept of doors using the image of a labyrinth as a door, a door that conceals by revealing. Shot in an underground laboratory, it adapts recent philosophical commentary on doors.

Displayed inside a small and deep box, viewers are able to see it by peering through its dark portico.