Eyes of the underworld (1929)

John Hueston, a wealthy newspaper publisher, plans to publish an exposé of a criminal gang but is silenced by a bullet. Pat Doran, rich sportsman, is consoling Hueston's daughter at her home when members of the gang break into the house in an effort to put their hands on the incriminating evidence accumulated by Florence's father. Pat chases the crooks off and follows them to their hideout; they capture him, and he is imprisoned on a deserted island. Pat escapes, rounds up the gang, and wins Florence's love.