The world known as Terra, is a planet covered almost entirely by water. People living on tiny, isolated islands somehow manage to keep civilization alive. With the need to travel from island to island, people have invented air ships, which come in a variety of shapes and sizes. Life goes on, but requires one thing to keep it that way, Quantum Refractors.
Below the surface of Terra there exists almost another world. This one is dark, ancient, mysterious, and inhabited by robots of destruction, known as Reaverbots. The world above and the world below are linked by Sub-Gates, usually small buildings with ladders or elevators that lead down into the underground. Dangers abound in the subterranean ruins, but they must be explored, for that is where people obtain the highly sought after Refractors.
Those who dare enter the world of the Reaverbots to retrieve the Refractors, are known as Diggers. Diggers keep the world supplied with enough Refractors to keep civilization going. A Digger’s means of traveling is of course by air ship, which can take them to just about any ruin in the world, however air ships also consume the power of the Refractors, and so the ravaging of the ruins goes on and on.
Eventually, there came to be people who would seek Refractors for their own profits as well as steal Refractors from other successful Diggers. These people also use air ships to travel from place to place and are called Air Pirates…