The Chicago police investigate a series of armed robberies perpetrated upon couples parked in lovers lanes with the same modus operandi - the thief steals the boy's wallet and then pistol whips his girlfriend. Since the victims agree that the thug was dressed as a hobo, a vaudevillian turned police officer agrees to go undercover and to see if the thief can be found one of the area's hobo jungles.
—David Bassler