When Brady and Boomer learn their dad was the best warrior in island history, they want to be more like him, so they attend Kinkow Fight School. But when instructor Mason favors the Kings, jealousy overcomes his previously prized pupil Mikayla.

It's the kings' birthday and the whole island is celebrating. When Boomer learns that Brady has been bragging to the entire island that he is the older twin, Boomer heads out to the belly of Mt. Spew to ask the volcano's Oracle which king was born first.