July 1910: a gruesome discovery has been made at 39 Hilldrop Crescent, Camden. Buried under the flagstones are the remains of Cora Crippen, former music-hall singer and wife of Dr Hawley Crippen.
No one would have thought the quiet, unassuming Dr Crippen capable of murder, yet the doctor and his mistress have disappeared, and now a full-scale hunt for them has begun.
Across the channel in Antwerp, the SS Montrose has set off for Canada. And slipping in among the passengers, almost unnoticed, a Mr John Robinson with his son, Edmund…