Jack Bone is a detective, and nothing gets in the way of solving a case-not even the recent death of his partner. Still reeling from loss, Bone accepts an assignment in Wolfston, investigating the profitability of England's last woolen mill. There's something strange about the staff at the mill, though-especially the night shift, who seem to have a lot of secrets. The employees at the Wolfston mill are vampires, and they don't like Bone snooping around. He escapes unscathed, but that isn't the end of his troubles. Bone's busy caseload also includes the suspected smuggling of illegal aliens into England in trucks owned by Astra Clothing. Nearby, in Leeds, he encounters the Russian gangsters who are running the show. In a curious twist, he finds safety with the Wolfston vampires, who agree to help him with his case while keeping him safe. Bone is right on the gangsters' tail when they produce their own powerful vampire, threatening the lives of Bone's close friends and family. Fearing further loss, he vows to bring the Russians to justice before it's too late, but how can he fight an immortal foe? This might be Bone's last case, but he won't go down without a fight.