The year is 1200 AD, dark days indeed, when misbegotten crusades & a desperate Church have laid a pox over the land. Days when law is meted out by fast swords & well-regarded superstition. Days when only the treasure-seeker & cut-throat dare to venture underground, into places where even God has taken leave. Into the maelstrom a Twilighter shall lead. He is a professional illuminator, a creator of magnificent tools. He is a man who can transform any dark passage into the glow of twilight. But something is awaiting the Twilighter, something too ancient & powerful for human hands. It might enlighten the world or be a cog of the apocalypse. Time is ticking. Other agents are on the hunt. World history is at stake. Prepare to be taken Yonder.