Hawkman must locate and secure a giant propeller guided by the human brain. Once he finds it, he must stop it from being used to drop bombs on New York. He does and uses the propeller to destroy the Japanese dragon sect's castle lair, when suddenly the Thunderbolt whisks him away to...?; The Sandman jumps in his Sandcar and heads for a desolate spot in northern New England in order to track down and secure the lost "Greek Fire" which can burn on water. He finds and rescues the kidnapped inventor, but is overcome by treachery, and thrown into a flaming lake. Using a supply of sand, he is able to put out a small portion of the fire, release himself from his bonds and rout the surprised Japanese before being whisked away by Johnny's Thunderbolt.; The Atom heads for San Francisco and first meets with an assistant who developed an explosive so powerful, a single grain could blow up a ship. Atom learns that the Black Dragon intends to blow up the whole city of San Francisco. A Japanese-American agrees to lead the Atom to the hideout of the sect, where he changes to Al Pratt, disguises himself as one of the workmen tunneling under the city, changes back to his fighting togs, then finishes off the enemy before the Thunderbolt comes for him.; Starman is hot on the trail of the Black Dragon when he suddenly spots a giant dirigible with the stolen U.S. dive bombers hanging from it, ready to launch an attack. The Astral Avenger succeeds in destroying several before they climb beyond his range into the stratosphere. He lands at a lab and contructs a device that will keep him warm in those altitudes, then heads back out to finish the job. Just as he succeeds, up pops the Thunderbolt to take him to Johnny.; Doctor Fate discovers the invention he is to recover out in the desert: a gigantic tank with a long-barreled flame thrower attached, and he dispaches it very quickly. Unknown to Fate, the Japanese have taken American Indian women and children hostage, forcing the men to try to re-take the tank from the Man of Magic. They overcome him with gas and capture the tank. After Fate recovers, he tracks down the Japanese and takes them on, with some help from the Indians. As he is being thanked, Fate is carried away by the Thunderbolt.; Dr. Mid-Nite's assignment is to find a Dr. Stander, inventor of an Y-Ray that can heal wounds and save lives. Not knowing where to look, Mid-Nite goes to the professor's lab, forges a note in Stander's hand and places it in a safe in the lab, which is found by the Police. A notice is put in the newspapers that Charles McNider has a copy of the formula for the Y-Ray, so the Black Dragon hunts him down and imprisons him with the good professor. McNider changes to Dr. Mid-Nite and defeats the Dragon as Stander destroys his invention, and soon after the Thunderbolt arrives on his urgent task.; The Japanese have kidnapped Charles Reagan, inventor of the amazing rocket-bomb, and are holding him in a submarine submerged in the murky depths trying to pry information out of him. He relents and tells his captors how to build the device, which they do, and they send it on its way to Chicago. The Spectre spots it, diverts it to Japan, then rescues the inventor, and captures the sub before the Thunderbolt shows up.; When Johnny opens his orders, he discovers that the War Department wants him to stay out of the situation completely! Angry, Johnny says the magic words and declares to the Thunderbolt that he'd like to be in the thick of things, and the Thunderbolt promptly drops him into the lap of the Black Dragons. They try every which way to dispose of Johnny, including several clones of him the T-Bolt whips up, until Johnny finally tells the Thunderbolt to get help from the other members before they succeed.; The leader of the secret Black Dragon Society has targeted America's secret weapons as their next area of operation. Meanwhile, at the regular JSA meeting, Chairman Hawkman announces that Wonder Woman has volunteered to be the group's Secretary for the rest of the war. The War Department has asked the Justice Battalion to investigate the threat of the Black Dragon Society and their messenger notifies them that eight inventors have been overcome and their inventions stolen. The Battalion members are each given sealed envelopes containing information on tracking down these items.; The Justice Battalion members arrive, save Johnny and round up the other members of the sect. Johnny and the rest then meet with Wonder Woman the next day to file their report of this adventure.