After a long, perilous journey, Hell Divers Xavier Rodriguez and Magnolia Katib discover the Metal Islands, a sunny, habitable zone where thousands of people live by fishing and farming. But this "paradise" is really a violent warrior society ruled by the cannibal King el Pulpo. For the first time in X's life, he is forced to lay down his arms and surrender. 

Left for dead on the nightmarish surface of the planet, Commander Michael Everhart and his team of Hell Divers barely escape with their lives aboard a new airship called Deliverance. After learning that Xavier "X" Rodriguez may still be alive, they mount a rescue mission for the long-lost hero. In the skies, the Hive is falling apart, but Captain Jordan is more determined than ever to keep humanity in their outdated lifeboat. He will do whatever it takes to keep the ship in the air - even murder.

The mission to Rio de Janeiro ended in victory, but it came at a dire cost, killing most of those who set out to rescue the stranded survivors. Even worse, the skinwalkers’ leader, Horn, escaped with his demonic crew and is coming to take the throne. Back at the Vanguard Islands, King Xavier Rodriguez has been severely injured in another battle to protect the kingdom. Now an infection threatens to kill the one man who can keep the peace. 

The Sea Wolf sets out to search for the Metal Islands. Leading the expedition is legendary Hell Diver Xavier Rodriguez. After enduring a decade on the poisoned surface, his survival skills will be put to the test on the dangerous open seas. But storms, sea monsters, and the cannibalistic Cazadores aren't the only threat to X and his small crew. Their mission will uncover hard truths about the history of the war that left humankind stranded in the air for centuries. The fate of those still living on the airships might very well rest on this perilous journey to find a new home.

Ten years ago, Hell Diver Xavier "X" Rodriguez fell to Earth. Those he left behind went on without him aboard the airship he once called home. Michael Everheart - the boy once known as Tin - has grown into a man and the commander of Hell Diver Raptor Team. While Michael dives to help keep the Hive in the air, Captain Leon Jordan rules with an iron fist at the helm of the ship. But unrest stirs under his strict leadership as a prophecy of hope sweeps the lower decks.