A deadly fire reunites coroner Martha Gunn with Detective Inspector Alex Randall. When firemen are called to an intense blaze at the Grange in Melverley, they find the bodies of Christie Barton, her daughter, Adelaide, and father-in-law, William, along with evidence that suggests the fire was started deliberately. Detective Inspector Alex Randall enlists the help of coroner Martha Gunn, but the puzzle deepens with a second house fire - the occupant, retired nurse Monica Deverill, is missing. Where is she, and what links the two fires? The answers lie in a secret buried in the past.