Sandman is dumped out of his cage by the hawk who rescued him near a tree that grew money! Each $1 bill has a message on it to thugs connected with the Brain Wave, so he hides and awaits them. When they show, they read the bills, which tells them to take jewels from Riffanys. He follows them from the store and is able to whip them before a Policeman shows up to take them into custody. Then the Thunderbolt arrives to whisk him away.; Brain Wave's thugs use a special gun that shoots indestructible spider webs at some guards protecting a safe in a person's home, which incapacitates them while they begin looting the safe. The Spectre arrives and takes on the crooks, but has a difficult time because of his size, so he rockets into outer space, finds a meteor and aims it toward the house where the crooks are looting the safe. It crashes and knocks the men out. As the Spectre is setting off an alarm for the Police, the Thunderbolt arrives and takes him away to Johnny Thunder.; The Brain Wave's minions, headed by Lucky Luke, are posing as plumbers in order to get into a bank to loot it. Doctor Fate shows up in time to trail the thugs back to Lucky's apartment, and he uses a typewriter to type out some bad news to Lucky. Noting that he has one more job to do, and it's Friday the 13th, Lucky decides to go through with the job, and Fate puts a stop to the plot just as the Thunderbolt shows up.; Johnny arrives at the Keystone Hotel, ready to take on the Brain Wave's thugs, but lands head first and is knocked out. Inside the hotel, a phony Senator Sebastin Graves overpowers the real Senator and takes his place. Johnny attempts to intervene, but his small size presents a real challenge to him until he thinks to have the Thunderbolt make his full size again! Still, Johnny is captured, so he asks the Thunderbolt to get the rest of the JSA pronto!; Townspeople head over to Keller's Circus, which is putting on a free show for the people, a clever ruse by the Brain Wave because it leaves the town deserted and wide open to be robbed blind. While the people back at the circus have been gassed, Starman shows up and follows the crooks into town from the circus and takes them on until the Police arrive...and then Thunderbolt shows up to whisk him away.; A special newspaper is delivered to Augustus Flack (and others), telling of "The Ace of Spades." Then an ace of spades card falls out with a note telling him where to take his blackmail money. Mid-Nite arrives and discovers the address to which the men are asked to bring their money, so he heads over to it, takes on the thugs under cover of his blackout bomb, and convinces the men that they have gotten lead poisoning from handling the papers Brain Wave had printed. They head over to a doctor that Charles McNider has recommended, and the doctor gases them and calls the Police.; The Atom witnessess many strange accidents and the victims, taken to a nearby hospital, just happen to be crooks of every description. He discovers that the Brain Wave has taught the men how to fake accidents in order to commit theft. The men, in spite of the Atom's attempts, escape from the hospital with a supply of radium and head for their hideout, followed by the Mighty Mite. He attacks the best he can until the Police arrive to arrest the thugs...and the Thunderbolt appears to take the Atom away.; Wonder Woman informs the JSA that all the minutes of past meetings have been stolen. The scene then shifts back to the moment the Brain Wave jumped from his tower, supposedly to his death. He survived and invented a way using electricity and special substance to shrink the JSA to 8" tall! Meanwhile, Wonder Woman heads home to look for the minutes and after she leaves, the members find themselves shrunk to 8" in height, and Brain Wave enters, imprisoning each member in a cage. When Brain Wave leaves the room, Hawkman calls his hawks, who come and take the members away as Brain Wave watches.; While flying along, Hawkman is captured by a JJSA member in a net, and he informs the young boy that his father is to be robbed by Brain Wave's men, so they head for the house, only to discover living tiny soldiers that are mixed in with the boy's regular toys. With a special yellow ray they regain their regular size and the Feathered Fury must come up with a different way of defeating the foe. As the Police arrive to arrest the thugs, Johnny Thunder's Thunderbolt shows up and takes Hawkman away.; The JSA saves Johnny and the Senator, then head over to the Brain Wave's tower at Sharktooth Bay. Brain Wave has wired explosives outside the tower to blow up the JSA as they arrive, but the Thunderbolt moves the explosives inside the tower and the Brain Wave accidently blows himself up!