On a hot July day, Lindsay Mathieson, confident, careless and thirteen years old, walks up the beach where she has played all her life, around the rocks and out of sight. She leaves behind her two younger brothers, and two cousins. She does not come back.

Thirty years later, the events on that fateful day remain a mystery. Gradually the cousins are drawn back to the High House, where as children they played on that sunny beach. There they must come to terms not just with the past, but with their own fallibility, and an uncertain future.