THE DEPTHS OF DARKNESS Sengoku has a plan to infiltrate the mad doctor Nishikiori's camp, but things backfire and Sengoku and his crew are sent on what may be a suicide mission to explore deep inside the mysterious pyramid. As they explore the treacherous depths of the pyramid, they make new discoveries but as always, just as the mysteries of this island begin to reveal themselves, Sengoku and his crew encounter more questions than answers. What incredible and inexplicable things will they find next in the deepest regions of this puzzling pyramid? From the Trade Paperback edition.