A blind detective helps authorities nab a killer no one's ever seen in this explosive mystery by the author of Blind Allies. Following the loss of his sight in World War I, ex-intelligence officer Capt. Duncan MacLain honed his other senses and became one of the most successful and well-known private investigators in New York City... Captain MacLain is playing a card game when he receives a phone call from Los Angeles. It's his old army buddy Belden Clark. The head of Clark Precision Tool Company is coming to town the next day for a quick business trip and would like to speak to the blind detective about a tycoon named Hugo Breitmeyer, he'd like him to investigate. The captain is happy to make time for his friend, but Clark's plane fails to reach its destination thanks to a bomb tucked away in its cargo hold. Clark wasn't the only person interested in Breitmeyer. The FBI would like to get their hands on him as well. Although no one knows what the man looks like, the Feds have a series of wiretap recordings that could lead them to the dangerous millionaire if the right person is listening. Enter MacLain and his talented senses. But identifying a criminal who lives in the shadows can be hazardous to a PI's health...
