It is 1941, and the Japanese midget submarine I-16-tou lurks unseen in the depths of Pearl Harbor, Hawaii. When the shock waves of the commencing Japanese aerial attack wake its crew, they rouse the machine from its silent slumber and begin an attack that will take down a U.S. battleship.

More than one American sailor swore revenge for his comrades that day. The crew of the I-16-tou, however, was never found.

In present-day Hawaii U.S. Navy investigators Lieutenant Commander Christopher Pastwa and Lieutenant Karen Yamura puzzle over a mysterious skeleton unearthed in Kailua. When it is confirmed to be one of the submarine’s lost crew, Pastwa and Yamura begin to unravel a dark secret lurking at the heart of their beautiful island.

This member of the crew might be confirmed dead, but what happened to his shipmate? He may be a chameleon, hiding in plain sight.