The year is 1861. The American Civil War has just begun, and London arms dealer Daniel Alberton is becoming a very wealthy man. The quiet dinner party held by Alberton and his wife seems remote indeed from the passions rending America. Yet investigator William Monk and his bride, Hester, sense growing tensions and barely concealed violence in this well-appointed mansion. For two of the guests are Americans, each vying to buy Alberton's armaments....

The golden summer of 1914. A time of brief enchantment when English men and women basked in the security of wealth and power, even as the last weeks of their privileged world was swiftly passing. Theirs was a peace that led to war.

Investigating evidence of a violent struggle at the home of Ministry of Defense member Dudley Kynaston, Pitt and the Special Branch discover the brutally murdered body of a young woman before realizing that Kynaston is not who he appears to be.