Meet Boston Blackie.

Boston Blackie (Morris Morris) tries unsuccessfully to strike up a conversation with attractive fellow ocean liner passenger Marilyn Howard (Constance Worth) He later rescues her when she is accosted by a man. When he tries to follow her, he runs into his nemesis, police Inspector Faraday (Richard Lane) who wants to take him in on suspicion of stealing some pearls. Blackie has to break his word and debark to clear his name. He trails Howard to the Coney Island amusement park, where she is poisoned and sends him to the Mechanical Man.