Sir Maurice Newbury is bereft as his trusty assistant Veronica Hobbes lies dying with a wounded heart. Newbury and Veronica''s sister Amelia must take a sleeper train across Europe to St. Petersburg to claim a clockwork heart that Newbury has commissioned from Fabergé to save Veronica from a life trapped in limbo.No sooner do they take off then sinister goings-on start to plague the train, and it is discovered that a mysterious cultist is also on board, determined to recover a precious artefact. Can Newbury and Amelia defeat him before he carries out his terrible revenge?But as Newbury and Amelia hurtle towards the only thing that can save Veronica, they uncover a terrible secret that could threaten the lives of everyone on board. A secret linked to Veronica''s past…
