Jeremiah Cuthbert Shelby (JC) and his wife Susan have been mustered back into the Navy to help solve a grisly murder on the grounds of the Admiral's residence at Pearl Harbor Hawaii. News of their success solving the brutal murders at the college library in Iowa and with the mysterious deaths associated with the B&B in London has spurred the Commander of the Pacific Fleet to seek their help. Their adventures in the islands take them into the dangerous lava tubes of the Big Island and far afield to Japan, the home grounds of the dreaded Japanese yakuza, the criminal residue of the ancient samurai warriors.