"In an alternate 1880s London, angels inhabit every public building, and vampires and werewolves walk the streets with human beings in a well-regulated truce. A fantastic utopia, except for a few things: Angels can Fall, and that Fall is like a nuclear bomb in both the physical and metaphysical worlds. And human beings remain human, with all their kindness and greed and passions and murderous intent. Jack the Ripper stalks the streets of this London...

London, 1896. Andrew Harrington's lover Marie Kelly was murdered by Jack the Ripper and he longs to turn back the clock and save her. Meanwhile, Claire Haggerty, forever being matched with men her family considers suitable, yearns for a time when she can be free to love whom she chooses. As their quests converge, it becomes clear that time is the problem--to escape it or to change it. Hidden in the attic of popular author--and noted scientific speculator--H.G....