Ali Dawson is a police officer working on crimes so old, the joke goes, that they are not only cold but frozen. What most people don't know is that the team travels back in time to complete their research. So far the team has only ventured a few years back but Ali's boss has a new assignment for her. He wants her to step back to 1850, the heart of the Victorian Age, to clear the name of Cain Templeton, the eccentric great-grandfather of Tory MP Isaac Templeton, the boss of her son, Finn. She arrives in London in January 1850. She finds herself in a house used by artists, with a dead woman at her feet. Soon she finds herself in extreme danger. Even worse - she appears to be stuck, unable to make her way back to the present.