Having suffered a nearly fatal head wound, Charles Sinclair has awoken in a nightmarish landscape of living stones and sentient trees, where demonic ravens watch his every move, ready for an easy meal. His only hope of escape is to traverse a treacherous maze of seven concentric rings, each with seven possible entries. His guide through this underworld labyrinth is a nameless birdman, who informs the desperate marquess that a refuge lies at the centre...