After six months in Depression-era New York, Lord Edward Corinth returns to London only for his old sparring partner, Verity Browne, to convince him to investigate a murder in Madrid. Her lover, David Griffith-Jones, has been convicted for the murder of a fellow Communist Party member and is set to face a firing squad. Even as Corinth is on the brink of exonerate this innocent man, two more murders occur. On the heels of their debut Sweet Poison, Edward and Verity join forces once again in search of the truth, but danger is all around them, and in the unstable world of 1930s Europe, there is no guarantee that justice will be served.