Callisto, Ganymede, Io and Europa are kids who live in the woods, each worshiping one of four gods, named the Giants, which are Jupiter, Saturn, Neptune and Uranus. The oldest is Gany, second Callisto, third Io and last Europa. Gany and Callisto are dating. Europa worships Uranus, Io Neptune, Callisto Saturn and Gany Jupiter. Callisto was sitting on a rock near a river, she was humming a song she written seeing Io running to her, yelling smiling. Io: CALLISTO! I HAVE SOMETHING TO SHOW YOU!