When a murder occurs on an ocean liner docked in New York, the trail leads to Coney Island and a spy ring.
Chester Morris
as Boston Blackie
Rochelle Hudson
as Cecelia Bradley
Richard Lane
as Inspector Faraday
Constance Worth
as Marilyn Howard
Jack O'Malley
as Monk
George Magrill
as Georgie
James Seay
as Mechanical Man
Charles Wagenheim
as The Runt
James Blaine
as Police Captain (uncredited)
Nestor Paiva
as Martin Vestrick (uncredited)
Ed Wolff
as Giant (uncredited)
Byron Foulger
as Blind Man (uncredited)
