A beautiful scientist at Oxford University, and a desperate killer in California - one stalking the other. On the internet...Tessa Lambert is gorgeous, young - and a genius. She has just created the first viable artificial intelligence programme. But her discovery is so controversial that she must keep it a secret even from her closest friends and colleagues. As her work grows daily more vital, Tessa's world begins to fall apart, and when her programme takes on its own completely malevolent existence, Tessa must make one last and absolutely terrifying connection...