When wealthy investment banker Luigi's body is found hanging from the crossbars of the George Washington Bridge, it is immediately thought to be a Mafia hit. Is it? Not according to a Catholic bishop with a diplomatic errand from the Vatican and an out-of-control Twitter account. As the truth unfolds, the reader meets a mad dwarf who eats insects and small rodents, a long-dead candidate for canonization, a deceased gangster who owned The Cotton Club in Harlem, and a tribe of mis-shapen males whose lives have been spent in tunnels under Hell's Kitchen.
Explosions, whispers coming from walls, mysterious billionaires from Grand Cayman, Luigi's terrified young wife with a suckling baby at her breast, treasure-hunters looking for buried gold in the basement – provide a frightening backdrop to a mystery that literally goes deeper and deeper into Manhattan as the story develops.

Hugo Miller, Ruth the Sleuth, handsome Gabriele Cortese and stalwart NYPD detective Mike di Saronno pool their considerable resources to solve a series of crimes that may hark back as far as seventy-five or one hundred years.