The battle in the undersea ruins continues. Chako is brought into the midst of the fighting and her presence allows the inner sanctum to be opened, revealing the weapon that Kamuro has been searching for: the hand of Poseidon! And with it comes the power to sink the whole world into the depths of the sea. In this final confrontation, the history of how Orpheus and Kamuro went from friends to bitter enemies is revealed… Don’t miss the exciting and heart-wrenching conclusion of Hard-Boiled Cop and Dolphin!