When Ares switches Xena’s body with Callisto’s, he is determined to have Callisto-in-Xena’s-body be the one that will join him and fight for him once again. He uses Callisto to live out his fantasies with Xena. But when he finds that Callisto, no matter what body she is in, is no Xena, he realizes he may have made a mistake. Xena-as-Callisto must battle against Callisto-as-Xena in order to stop Callisto’s crazy rampage, mainly her attempt to have Xena’s mother die in the same way that Callisto’s did: by fire.