Set in a desert-stricken near-future following World War III, *Oz* depicts a world where humanity has fractured into warring nations vying for dwindling resources. Hope rests on the legend of Oz, a hidden laboratory established by leading scientists. Filicia Epstein, the daughter of a renowned scientific family, joins forces with a mercenary named Yo Muto on a perilous journey to locate Oz and find her missing brother, Lyon, believed to be there. Their quest quickly becomes far more complicated than anticipated.