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 met 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, secret meetings in the middle of the night and a race to prevent more deaths. Add spoilt twin heirs, blackmail, and strange, unexplained activity aboard the St Piran and this all makes heavy weather for Bartlett and Boase. Deception and disguise come together in the final spectacular and surprising showdown when the killer is revealed.