The Koronus Expanse lies beyond the Halo Stars at the ragged edge of the Imperium, a vast and largely uncharted frontier reached only through the perilous warp-route known as the Maw. Here the writ of Terra is a distant rumour, and the void belongs to whoever is bold or ruthless enough to seize it. Fortunes beyond imagining wait among its stars, and so too do a thousand ways to die.
Into this darkness sail the Rogue Traders and their retinues, chartist captains and the Imperial Agents who shadow them, each pursuing profit, plunder, or the quiet errands of distant masters. They map dead xenos empires and plunder their tombs, broker with alien powers no loyal citizen would name, and carve fleeting dominions from worlds that have never known a human foot. Law here is the reach of one's guns and the length of one's purse.
Yet the Expanse is no empty prize. Eldar corsairs stalk its trade-lanes, Ork freebooterz gather in the drift, and older, stranger things stir in the ruins of civilisations that died before mankind climbed from Terra's mud. Many an expedition has sailed into the Koronus with holds empty and ambition boundless, never to be heard from again. It is a place where the greatest rewards and the most terrible fates are one and the same.