Griz's family lives on a little island in the Outer Hebrides, on a mostly depopulated Earth. Over a century before, something unknown, but referred to as the Gelding, caused the human reproduction rate to plummet to almost nothing. Griz's ancestors were among those who, as the population crashed, moved to remote areas where they wouldn't meet other people accidentally. The family consists of Griz, Griz's parents, and brother and sister Ferg and Bar. There was another sister, Joy, not much older than Griz, who is the youngest..Griz tells us the heartbreaking story of his sister Joy chasing a kite that got loose, and accidentally tumbling over the cliff.
Between the rocks and the powerful surf, she couldn't survive, and they could never recover her body.
One day, a ship with red sails arrives in their little harbor, carrying a man called Brand, who says he wants to trade. Brand, we soon learn, is a charmer, a storyteller, a liar, and a thief.