On their journey home, Ella and Owen come across unicorn twins who each believe they are better than their twin. The dragons are swept up in the unicorns' quibble, participating in crazy competitions to prove which twin is the best.

Will Ella win and prove to her brother that she is the better twin? Can Owen show Ella that he is the best? And if they are so busy arguing with each other, will they ever be able to find their way home?