The sky-city of Tyr, floating above the frozen wasteland of a dead world, is a place of spells and skyscrapers, where the ruling council of elders struggles to maintain its power against the growing influence of technology. A clandestine rebellion is underway, assassinating nobles and threatening to topple the Council entirely, while far beneath the city a haunting, malevolent presence from Tyr's mystical past silently gathers strength.

But a far more pressing issue is at hand – for the first time since its founding millennia ago, Tyr has begun falling toward the surface.