Meet Moss, a dino-dung shoveler working in Primordia's royal stables. Moss dreams of being a knight, but stable boys don't usually grow up to be knights. Fate takes a twist when Moss discovers that he has a gift for speaking to dinosaurs. He is enlisted to train the previously-untrainable Tyrannosaurus rex belonging to the king's daughter, Princess Opal! When a treacherous knight launches a coup against the king, the castle descends into chaos. Can Moss and Opal save the Kingdom? Or will they be added to the dino-dung pile?