Earth’s seven greatest heroes unite against the threat of an alien invasion and decide to remain together to defend Earth against attacking aliens, sorcerers, super-villains, and any other threat that might arise. Among their number are the Martian Manhunter, last survivor of Mars; Superman, the super-powered last survivor of the planet Krypton; Batman (the Dark Knight Detective); Green Lantern, wielder of an alien Power Ring; The Flash, the Fastest Man Alive; Hawkgirl, Winged Wonder and policewoman from the planet Thanagar, and Wonder Woman, Princess of the Amazons.