Synopsis: The Star-Spangled Kid and Stripesy stop a gang of saboteurs at a steel factory. They question one of the perpetrators and get him to lead them to a castle where more saboteurs are hiding. The saboteurs attempt to kill the Kid, but he escapes the danger. Many of the saboteurs are killed when the castle collapses, but not before giving the Kid a tip about a bund meeting.
The Kid and Stripesy return home to make a plan. They arrive outside the meeting as Sylvester Pemberton and Pat Dugan. Sylvester is kidnapped by the Nazis which allows him to infiltrate the meeting. The Kid and Stripesy are then able to break up the gang and apprehend the leader Ferd Klaug.
Mystery novelist John Law dons a costume with suction cup and a web-shooter side-arm to become the Tarantula. The Tarantula apprehends mobster Ace-Deuce on his first mission, but the crook then escapes from police. Law then goes undercover as Pugs O'Bannon and joins the mobsters' gang. When Ace-Deuce strikes again, the Tarantula is on the scene to stop him. Ace-Deuce tries to make a daring parachute getaway, but the Tarantula manages to tangle the chute halting the escape.
Synopsis: A giant metal robot attacks a bank president then loots the bank vault. The Star-Spangled Kid and Stripesy are unable to prevent the robot's getaway, so they return home. Sylvester then meets with a group of professors. One of them is Professor James Stanton, a Jekyll and Hyde type, also known as Dr. Weerd. The villain plans to kidnap Sylvester, but when he sees the Star-Spangled Kid, he grabs him instead.
The Kid learns that Dr. Weerd created the robot. He summons Stripesy who has followed after the Kid's abduction. After many tries, they finally defeat the robot. Dr. Weerd assumes his James Stanton identity which allows him to elude capture.