Lo scrigno dell'Imperatrice

The Detective of the Impossible and Java travel to China to help an old friend, the medium Milly. British intelligence is looking for an ancient artifact: a chest that belonged to the "Empress Dowager" in the early twentieth century. But why is it so precious? And why does the "Black Duke", Tsai Lan, want to take it over? The key to the enigma lies in the tormented memories of an elderly English lord and in the acts of violence committed during the bloody "Boxer Rebellion" of the year 1900!