Lumsden Moss is a fugitive thief and a passionate bibliophile. Since childhood, he has constantly blamed himself for the tragic death of his girlfriend, Memoria, who had strange abilities. An attempt to take revenge on the judge by stealing a copy of a rare book results in a meeting with dangerous people and receiving an equally dangerous task. Together with his friends - Imogen, the strange creature Rainbow and the Craftsman Raven - he goes to Nightjar Island. It is a devastated place, poisoned by war and genocide - the Purge. They are pursued by the Red Lamprey crime syndicate, police agents and a frightening witch girl with a nightmarish pet monster. In a fantastical world still reeling from World War II, where technology is intertwined with magic, Moss and Imogen will have to decipher the secrets of their past to discover the dark heart of the cursed island.