Following the events of the first Blue Dragon series, Shu and Bouquet join a resistance group fighting the invading army of General Rogi. Along the way they meet Noi, a mysterious child who can bring back Blue Dragon, the shadow partner bound to Shu, and they protect her from a red dragon that is hunting her. Shu and his companions then set out on another journey to learn what purpose the dragons serve. They must pass the dragons' trials and halt a chain of events that endangers humanity. This 51-episode TV sequel mixes adventure, comedy, fantasy and the supernatural.