Billy Knight wants to ride out Key West's slow-season with the occasional charter and the frequent beer. But when he discovers a dead body floating in the gulf, Billy gets drawn into a deadly plot of dark magic and profound evil. Along with his plucky, gun-happy friend, Nicky, and Anna, a resilient and mysterious survivor of her own horrors, Billy sets out to right the wrongs the police won't, putting himself in mortal peril on the high seas.