Dr Temperance Brennan, forensic anthropologist, heads for Guatemala. In 1982, soldiers entered the village of Chupan Ya, rounding up women and children. No records were kept. The bodies are said to lie in a mass grave. Tempe digs in the cold, damp pit and uncovers the bone of a young child. Something savage happened twenty years ago. And something savage is happening today. Four girls are missing from Guatemala City, including the daughter of a high ranking official. When a young archaeologist is brutally murdered, Tempe realises that she may be the next victim.