Sirius Black, the last of a pureblood vampire line, lives alone in the isolated Black Manor after destroying his own family. When he saves and later turns an orphaned boy, Harry, he raises him in the manor’s darkness, far from the human world. Remus Lupin, a sheep farmer and son of a monster hunter, crosses into forbidden Black land searching for a lost lamb—only to be hunted and captured by something far worse than he expected. When Remus and Sirius collide, the boundary between predator and prey begins to blur.