Bob is given the task of accompanying a shipment of penicillin to the west coast, which is to be used on our wounded soldiers. While his train is going through a tunnel, the car carrying the drug and its caboose mysteriously disappear!; Both the Japanese and Nazis are interested in learning the location of vast gold deposits discovered by Zoologist Donald, who has since disappeared. The Terror Twins venture to the area to find the missing scientist and rescue his daughter from the cluthches of the Nazis.; The Terror Twins must battle a group of super-criminals who are plotting to steal America's three largest fortunes in a daring abduction scheme.; Vickie is invited by the Women Volunteers to ride in the lead truck of a parade honoring the Great Salvage Scrap Drive. Durinbg the procession, armed German bandits take over the truck and drive it to an outlying area and dump the contents....all to demoralize Americans. Hale takes an invisibility pill and follows the gang to their HQ and deals with them there.