A vanished squid. A hidden London. A fight for the fate of the world.
Billy Harrow, a cephalopod specialist at London’s Natural History Museum, thought his life was ordinary—until the museum’s prized Giant Squid vanishes without a trace. Suddenly, Billy is thrust into an unseen London teeming with magic, murder, and madness.
Caught in a deadly struggle, Billy encounters bizarre and dangerous factions: squid-worshiping cultists, a sentient tattoo, sorcery-wielding detectives, and ancient spirits rallying magical familiars. And always lurking are Goss and Subby, a terrifying demonic duo with their own agenda.
As secrets unravel, Billy discovers he holds the key to a cosmic calamity—the squid, an embryonic god capable of ending all existence. To survive, Billy must navigate this dark and dazzling underworld before it swallows him whole.