Award-winning author Matt Cost brings us back to Brooklyn in the Roaring '20s and Hungarian private eye, 8 Ballo, who is hired by Theda Lazar Vogel to prove that her husband was murdered. His colorful cast of friends returns, as well as legendary figures such as Dorothy Parker, Coleman Hawkins, Bugsy Siegel, and Lucky Luciano.

8 discovers that a priceless Aquila—an ancient eagle Roman standard carried into battle 2,000 years ago—was stolen from Karl Vogel when he was killed. This provides ties to a secret German organization known as the Batavi. But Vogel was also involved in the eugenics movement centered in Cold Spring Harbor on Long Island, as well as being involved with the Ku Klux Klan.

As 8 peels back layers of the underbelly of 1920s Brooklyn, the more complicated and dangerous it becomes for him and those who are important to him. What is happening at Cold Spring Harbor with Herman Wall and the eugenics movement? Who are the mysterious Germans threatening 8? And what is the identity of the charismatic Grand Cyclops? 8 must race against time to uncover the truth and put a stop to the most chilling triumvirate ever conceived.