A tornado transports the Hall of Justice to Oz where Mister Mxyzptlk, who has once again escaped from the 5th Dimension, informs the Super Friends that they must find The Wizard to get home. Along the way they encounter the Wicked Witch of the Worst Kind in a gingerbread house who turns Superman into the Tin Man, Wonder Woman into the Cowardly Lion and Aquaman into the Scarecrow.