Like "Shadow," another of Dave Duncan's early books, this is the story of an iconoclastic hero set in the far future, in a world that doesn't work exactly the way ours does. In this world, because of the way the earth revolves and rotates, the sun moves across the sky with agonizing slowness. It takes lifetimes for a region to experience dawn, midday and dusk. From generation to generation, the people of this world forget the catastrophes that occur when the sun moves -- except for the "angels," people who have preserved the ancient knowledge and work to try and save the other people from the destruction that threatens them when the sun moves. The hero of this book, Knobil, was born among the herdsmen, a savage race where the men kill each other and exile their sons so that every man can have as many women and children as possible. Knobil, however, is the son of an angel, and his destiny soon takes him among all the other people of his world -- the beautiful but mindless seafolk, the cruel slavers, the wily traders, the terrible spinsters whose secret he discovers nearly too late.