The most exciting installment to the Edgar Award winning Samurai Mystery series. When a man with a tattoo covering his back is found floating in the water at a rice ceremony, Seikei and Judge Ooka know it's a bad omen. Soon there are seven of these men with partial tattoos on their backs. All different, all dead, all seemingly unrelated - except for the tattoos. It becomes apparent these men are not just carrying body art, but a treasure map...to what? And why is carrying this map so mortally dangerous? Seikei must find and assemble all seven tattoos to find the answer. And the path to a most terrifying destination.