When the somewhat disreputable Martin Beckwith builds a midget submarine that uses a novel form of propulsion, he has little idea that an unlikely gang of buccaneers plans to commandeer his vessel for their own nefarious purposes.
When a ship is hijacked on a remote Pacific atoll, Alex McKay secretly revives Mudlark’s covert facilities to rescue the crew. With militants, mishaps and a vengeful submarine builder closing in, the mission becomes a daring gamble for survival.