Twenty-year-old Constance Horton has run away from her life in Victorian London, disguising herself as a boy to board the Makepeace, an expedition vessel bound for the icy and unexplored Northwest Passage of the Arctic. She struggles to keep her real identity a secret on the ship, a feat that only grows more difficult when facing off with the constant dangers of the icy North. Even more dangerous than the cold, the storms, and the hunger, are some of the men aboard, including the ship's scientist Edison Stowe. He seems to be watching Constance, and she knows that his attention could be fatal. In London two years later: Maude Horton is searching for the truth. After being told by the British Admiralty that her sister's death onboard the Makepeace was nothing more than a tragic accident, she receives a diary revealing that Edison Stowe had more of a hand in Constance's death than the returning crew acknowledged. In order to get the answers she needs, Maude decides to shadow Edison. She joins him on a new venture he's started to capitalize on the murder mania that has all of London in a frenzy, a travel company that takes guests around the country via train to witness public hangings, to extract the truth from him in any way possible. As tensions and dangers mount, it ultimately falls to Maude to enact the ultimate revenge to get justice for her sister.