As the title suggests, this episode is really a little story entirely about how important Harkuryuu (or in some places he's know as Jeep) is to Sanzo and his companions. The story starts off with the men checking into an inn that prohibits them from bringing pets in. Therefore, Harkuryuu is to be left outside in jeep form. He soon catches a little cold and sneezes in the presence of three little children. At the same time, a bunch of robbers were looking for something 'big and expensive' to steal for their boss. When Hakkai comes out later to check on Harkuryuu, the jeep is no longer there. Worried, Hakkai goes to tell the rest of them about Harkuryuu's sudden dissapearance, leading them to wonder if the dragon had run away. Then another question arises. How are they going to continue their journey without the jeep? (thetvdb.com)