After crashing on the Dark Side of Kinkow, Boomer and Brady find themselves fighting for their lives as the Dark Side grows in strength by the minute. As they search for a new way home, they discover the Cave of Legends.

When their corndog disappears into a hidden chute underneath their throne, the kings discover a royal bunker, the home of all secret Kinkow government operations. Mason and Mikayla admit that they have been running the country themselves.