Ali Dawson is a police officer working on crimes so old they’re not only cold but frozen. Her team travels back in time to complete their research. A prominent MP has asked her boss to send her back to 1850 to clear the name of his grandfather, Cain Templeton. While researching the Victorian era, she learns that Templeton was part of a sinister group called The Collectors, the rumour being that you had to kill a woman to become a member. She arrives in London in 1850 and soon finds herself in extreme danger. Even worse - she appears to be stuck.