One winter's morning, they came and a shadow moved across the mind of the world. They unmade our reality by their presence. Those that saw them died instantly. The rest survived. They're the unlucky ones. Everything imaginable can now be found on the streets of our towns and cities. Nothing is impossible, nowhere is safe. Grace and friends are making their way along the Hudson. It should be an easy enough journey but time - and The Change - have other ideas. U-Boats, the hooks of the Fishermen, and the horrendous Lizabeth Fforde lie just around the bend.