Superman is accustomed to the faces of Mxyzptlk, an immortal and omnipotent lutin of the 5th dimension that regularly goes to Earth to "play" with the Man of Steel, even when his games involve sowing chaos throughout the world. But the part takes an unusual turn when the 5th dimension is besieged by an army of evil luteins. For the first time, a lutin falls to the ground, without life... Faced with the massacre that takes place, Mxyzptlk and Bat-Mite, Batman's most fervent fan, of all dimensions, flee on Earth to find help from the superheroes.