She's seen the killer's face. But he's also seen hers... 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 of them will be dead. Alone, scared and trusting no-one, she flees for her life, running to the one place she feels safe. But the killer won't rest until he's eliminated the last witness to his crime . . .