When a nine-meter-long dead squid is stolen, tank and all, from a London museum, curator Billy Harrow finds himself swept up in a world he didn't know existed: one of worshippers of the giant squid, animated golems, talking tattoos, and animal familiars on strike. Forced on the lam with a renegade kraken cultist and stalked by cops and crazies, Billy finds his quest to recover the squid sidelined by questions as to what force may now be unleashed on an unsuspecting world.