Meet Inspector George Bartlett and Constable Archibald Boase in their first investigation together. In the closing months of 1921, Bartlett and Boase have a missing girl on their Falmouth patch. Before long they find themselves drawn into a murder investigation when another girl is found dead on a local beach. We meet the Pengelly family, unwittingly drawn in through their daughter's involvement with the prime murder suspect and find ourselves involved in mysterious goings-on at Penvale Manor. Deception and disguise come together in the final spectacular and surprising showdown when the killer is revealed.