The First National Blood Bank stores its reserves in an impregnable bank in the moon's Descarte's Crater. With 80% of humankind infected by P2, the price of a healthy litre of blood has reached 1.84 million. Dallas knows exactly how secure the vaults are - he designed them. But he needs that blood, for without it his daughter will die. There's only one way to get it: he knows it, his employers know he knows it and Dallas must attempt the impossible. If he succeeds, mankind might just have a future.