In order to gain favour with the Queen of Throng, Bob reverses the direction that Ahead of Under was moving and thus ends the motion sickness experienced by the continent's populace over the years. Unfortunately this sent the land mass on a collision course with Under, and Russel has to travel to Ahead of Under and try to set things right before his kingdom's crushed. Meanwhile Vernon and Populah have to protect Under from the ravenous Bedrock Beasts emerging from Ahead of Under.