Hawkman is sent to Mexico to deal with the Nazi threat to wreck the Southern Pacific Railroad in case of war, and meets with a man supposedly to be a Mexican Secret Police agent, but actually the villain in disguise. Hawkman then infiltrates the spy ring, gathers documents proving espionage activities, rounds up the spies, then heads for South America to meet up with the other JSA members.; Johnny is sent to Cuba to discover the whereabouts of master espionage agent, Bradley Zenea, but is captured by a gang headed by a spy named Miguel. Johnny tracks the spies down, but can't best them because the Thunderbolt will only respond to Johnny's magic words in Spanish! Johnny is caught and the gang decides to feed Johnny to the sharks! By accident, brother John says "Say You" in Spanish and the T-Bolt helps Johnny mop up the oppositon.; The Man of Night and Hooty go to Colombia to investigate cases of mass hypnotism that causes the people to become like robots for the Nazis to control.; The Ghostly Guardian arrives in Argentina to deal with Fifth Columnist activity concerning the disappearance of Army planes, and spots an "octopus of the air" machine causing the trouble. While its pilots commit suicide, the real leader has been captured and is in custody. Jim Corrigan and the Argentine Chief of Police take the villain toward a prison when other enemy agents intercept them. The Spectre makes short work of the octopus planes and captures the spies.; Al Pratt heads for Chile to offer his services in ridding the nation of the spread of Nazi propaganda, but it is the Atom who takes the lead in discovering the secret printing press turning out the Nazi propaganda.; Venezuela is on the docket for the Sandman, who must investigate Nazi attempts to sabotage oil wells leased to the United States and Great Britain. He discovers the saboteurs and wades into them before a shot fells the Man of Sleep, and who is also drugged while they try to carry out their plans to destroy wells in a lake. Awakening, the Sandman heads for the lake, mops up the villains and prevents the destruction of the wells.; Dr. Fate arrives in the Republic of Brazil to investigate the Nazis new invention: a floating fortress gunship, which the Germans plan to use as an floating Seigfried Line to conquer the world.; Starman heads for Bolivia and meets up with a member of that nation's secret police, and learns that the Nazis are exploiting the nation's tin mines, but no one can discover just how the Germans get in and out of the mines without being seen.; The FBI Chief in Washington greets the JSA members and thanks them for dealing with the 5th Columnists (back in All-Star #4). However, he tells the members that our own hemisphere is being threatened by saboteurs and spies, particularly in Central and South America, who are aiming at controling the "Southern Pacific" of Mexico, a vital supply-link railroad, as well as formenting revolution inside friendly governments there. He gives each member an assignment in a nation located there to combat these issues at hand.; As the JSA members return from their assignments, they are surprised to learn that their girl friends are there to meet them. However, Johnny has not returned and Daisy is very concerned. Just then, Johnny rushes in, being pursued by Bradley Zenea and a man, thinking that he had agreed to marry the girl. He discovers that his ideas were wrong, so he goes out for a moonlight walk with Daisy. As they gaze at the moon, Johnny wishes that he had Daisy all alone....on the moon...and the Thunderbolt grants that wish!