Could a mysterious music box hold the key to unlocking the puzzle behind a gruesome murder for Detective Inspector Silas Quinn? London, 1914. Despite a number of setbacks, rehearsals for The Hampstead Voices' Christmas concert are continuing apace. The sold-out event is raising funds for war refugees, and both Winston Churchill and Edward Elgar are expected to attend. But the most disturbing setback of all occurs when the choirmaster,...