Summary: Celestials and their ancient legacy have disappeared with time's passing.
Summer is one of the last remaining Celestials in the entire land of King Lance and King Slade. Once she's discovered and brought before King Slade, her Element - Fire - is taken advantage of. While Summer's being juggled between two Kingdoms, no one notices as a third Kingdom arises.
And who is the King? Not a man. It's Summer's long lost mother.
Stuck in between the Kingdoms, it's up to Summer to decide the fate of all the Kingdoms - once and for all.