Crisis On Earth-A! The Justice Society of America has been pitted against Johnny Thunder's Lawless League of Earth-A. As the two groups battle, the criminals get the upper hand at first, but the JSA manage to turn the tables and defeat each Lawless League member. Trapping them in an energy bubble, Green Lantern forces them to explain what happened. When they learn that Johnny Thunder had the criminals gain the super-powers of the Justice League, the group then tries to use their powers to try and change history back to the way it was. Amazingly, not even Dr. Fates magic or Green Lantern's power ring can counteract the Thunderbolt's magic.
Following Johnny Thunder to the moon, the JSA battle his alien creations, and beat each one. As the battle rages on, Johnny Thunder is batted around and eventually gets fed up with losing constantly and orders the Thunderbolt to change everything back to normal. As a result everything is reversed and nobody has memory of what had happened. Johnny Thunders of Earth-Two makes the JSA meeting on his home Earth, while on Earth-One the Justice League unit for a regular meeting, where they go over impending crimes. In the end the only one who remembers everything is the Thunderbolt.
