Desc: Shackled Lightning: With Frank Merrill, Lorraine Eason, Clarence Burton, William Conklin. Police officer Frank Brady is sent on an undercover operation to apprehend a gang of drug traffickers. After he becomes part of the gang, he falls in love with Helen Matthews, a young woman whose uncle is implicated and subsequently murdered. When Frank learns that the secret head of the gang is prominent banker John Kingsley, and that there is a plot to abduct Helen, he warns her by means of a wireless device. She makes her escape in time, Frank has Kingsley arrested, and the two sweethearts are reunited.