The Ruin Ring formed a slim dense halo three kilometres thick, seventy kilometres broad, orbiting five hundred and eighty thousand kilometres above the gas giant Mirchusko. Its albedo was dismayingly low; most of the constituent particles were a dowdy grey. A haze of small particles could be found up to a hundred kilometres outside the main band in the ecliptic plane; dust mainly, flung out from collisions between larger particles. Such meagre dimensions made the Ruin Ring totally insignificant on a purely astronomical scale. However, the effect it had on the course of human events was profound. Its existence alone managed to bring the richest kingdom in history to the verge of political chaos, as well as posing the Confederation’s scientific community the greatest mystery it had ever known, one which remained unsolved a hundred and ninety years after its discovery.

It could so easily have gone unnoticed by the Royal Kulu Navy scoutship Ethlyn , which investigated the system in 2420. But system survey missions are too expensive to mount for the crew to skimp on detail even though it is obvious there is no terracompatible planet orbiting the star, and naval captains are chosen for their conscientious nature.

The robot probe which Ethlyn fired into orbit around Mirchusko performed standard reconnaissance fly-bys of the seven moons above a hundred and fifty kilometres in diameter (anything smaller was classed as an asteroid), then moved on to analyse the two rings encircling the gas giant. There was nothing extraordinary or even interesting about the innermost: twenty thousand kilometres broad, orbiting three hundred and seventy thousand kilometres out, the usual conglomeration of ice and carbon and rocky dust. But the outer ring had some strange spectrographic lines, and it occupied an unusually high orbit. Ethlyn ’s planetary science officer raised the probe’s orbit for a closer look.

When the achromatic pictures relayed from the probe’s optical sensors began to resolve, all activity on board the Ethlyn came to an abrupt halt as the crew abandoned their routine to assess the scene. The ring which had the mass of a modestly sized moon was composed entirely of shattered xenoc habitats. Ethlyn immediately deployed every robot probe in its inventory to search the rest of the system, with depressingly negative results. There were no other habitats, no survivors. Subsequent searches by the small fleet of Kulu research ships which followed also produced a resounding blank. Neither could any trace of the xenoc race’s homeworld be found. They hadn’t originated on any planet in the Ruin Ring’s system, nor had they come from any of the surrounding stars. Their origin and death were a complete enigma.

The builders of the wrecked habitats were called the Laymil, though even the name wasn’t discovered for another sixty-seven years. It might seem that the sheer quantity of remnants would provide archaeologists and xenoc investigators with a superabundance of research material. But the destruction of the estimated seventy thousand plus habitats had been ferocious, and it had happened two thousand four hundred years previously. After the initial near-simultaneous detonation a cascade of secondary collisions had begun, a chain reaction lasting for decades, with gravel and boulders pulverizing large shell sections, setting off another round of collisions. Explosive decompression tore apart the living cells of plants and animals, leaving already badly eviscerated corpses to be decimated still further by the punishing sleet of jagged fragments. And even after a relative calm fell a century later, there was the relentless chafing of the vacuum, boiling surface molecules away one by one until only phantom-thin outlines of the original shape were left.

In another thousand years the decay would have precluded almost any investigation into the Laymil. As it was, the retrieval of useful artefacts was a dangerous, frustrating, and generally poorly rewarded task. The Laymil research project, based in Tranquillity, a custom-grown bitek habitat orbiting seven thousand kilometres above the Ruin Ring, depended on scavengers to do the dirty work.

The scavengers who ventured into the Ruin Ring were driven by a variety of reasons; some (mostly the younger ones) thought it was adventurous, some did it because they had no choice, for some it was a last resort gamble. But all of them kept going in the hope of that one elusive Big Find. Intact Laymil artefacts raised huge prices on the collector’s market: there was a limited and diminishing source of unique alien objets , and museums and private collectors were desperate to obtain them.

There existed no prospecting technology which could sift through the Ruin Ring particles and identify the gems amid the dross; scavengers had to don their spacesuits and get out there amid the hurtling shell splinters and go through it all one piece at a time, using hands and eyeballs. Most of them earned enough from what they found to keep going. Some were better at it than others. Luck, they called it. They were the ones who found a couple of the more intriguing pieces each year, items which would tide them over in high style for months at a time. Some were exceptionally lucky, returning time and again with pieces the collectors and research project simply had to have. And some were suspiciously lucky.

If pressed, Joshua Calvert would have to admit membership of the second category, though it would be a self-deprecating acknowledgement. He had pulled six decent pieces out of the Ring in the last eight months; a pair of reasonably intact plants, a couple of circuit boards (fragile but OK), half of a rodentlike animal, and the big one, an intact egg, seven centimetres high. Altogether they had brought in three-quarters of a million fuseodollars (the Edenist currency, used as a base currency by the Confederation as a whole). For most scavengers that would have been enough to retire on. Back in Tranquillity people were shaking their heads and wondering why he kept returning to the Ring. Joshua was twenty-one, and that much money could keep him in a satisfactorily high-rolling style for life.

They wondered because they couldn’t feel the intense need burning in him, surging down every vein like a living current, animating each cell. If they had known about that tidal-force drive they might have had an inkling of the unquiet nature lurking predator-fashion behind his endearing grin and boyish looks. He wanted one hell of a lot more than three-quarters of a million. In fact it was going to take nearer five million before he was anywhere near satisfied.

Living in a high-rolling style wasn’t even an option as far as he was concerned. A life spent doing nothing but keeping a careful eye on your monthly budget, everything you did limited by the dividends of prudent investments? That sounded like living death to him, suspended inanimation, strictly loser’s territory.

Joshua knew just how much more to life there could be. His body was perfectly adapted to handle free fall, a combination of useful physiological traits geneered into his family by wanderlust ancestors long distant. But it was just a consort to his mind, which was hardwired into the most riotous human trait, the hunger for new frontiers. He had spent his early childhood listening to his father telling and retelling stories of his own captaincy: the smuggling flights, outsmarting Confederation Navy squadrons, the fights, hiring out as mercenary warriors to governments and corporations with a grudge, of travelling the universe at will, strange planets, fanciful xenocs, willing women in ports scattered across the colonized galaxy. There wasn’t a planet or moon or asteroid settlement in the Confederation they hadn’t explored and populated with fanciful societies before the old man finally found the combination of drugs and alcohol which could penetrate the beleaguered defences of his enhanced organs. Every night since he was four years old Joshua had dreamed that life for himself. The life Marcus Calvert had blown, condemning his son to sit out his own existence in a habitat on the edge of nowhere. Unless . . .