Electrician's Mate Third Class Matthew Mayhem seems like any other sailor aboard the USS Honolulu—until the day Russian terrorists mistake his nuclear submarine for an easy target.

For three years, Matt has kept his head down and his family secrets buried. The basement dojo in Massachusetts feels like another lifetime. The ancient traditions passed down through six generations of his family—techniques that trace back to the shadow warriors of feudal Japan—were supposed to stay hidden.

But when armed operatives posing as marine biologists take control of his boat and threaten his shipmates, Matt faces an impossible choice: maintain his cover as an ordinary electrician, or embrace a legacy he's spent years trying to forget.

The terrorists have planned for everything—except a sailor who can move like smoke, strike like lightning, and disappear into shadows that shouldn't exist aboard a submarine.

Some family traditions are worth preserving. Some secrets are worth dying for. And some enemies are about to learn that the Mayhem family has been protecting those who can't protect themselves for over four hundred years.

The first explosive thriller in the Matthew Mayhem series—where ancient ninja techniques meet modern warfare in the depths of the ocean.