In the conclusion of a two-part story, the Justice League squares off against Metamorpho, a freakish mutant with the ability to change his molecular structure at a moment's notice. The mission is particularly painful for League member John Stewart (aka The Green Lantern); it seems that Metamorpho is actually his old friend Rex Mason. As it turns out, however, the real villain of the piece is not Metamorpho but ruthless businessman Simon Stagg -- ironically, the father of Rex Mason's sweetheart Sapphire. ~ Rovi