Just before dawn in the hills near the Scottish border, thirteen passengers on a hot-air balloon flight witness a brutal murder. Within the next hour, all but one woman will be dead. Alone, scared and trusting no-one, she flees for her life, running to the one place she feels safe. But she's seen the killer's face, and he's seen hers - and he won't rest until he's eliminated the last witness to his crime... In the top tier of psychological thriller writers.