Or: A Summoning of Summons. There’s a lot of summon summoning going on.
If Golbez gets the last crystal, then the path to the moon will be open. Cecil and co. race to the sealed cave to stop the villain from fulfilling his vague and lofty goal. When the forces of good and evil clash, it becomes clear that success can only be gained with the ample support of riends and family, townships and kingdoms, the living and the dead, monsters and humans, above ground and below.