Spirit Warriors - The Spirit Thief

Five children discover from Shen the Dragon that they are spirit warriors, on a quest to find twelve spirit pieces - if they fail, the evil Li will find them and then control the universe! Bo, the leader of the spirit warriors, finds herself severely tested when she has to battle with Yama, an evil spirit thief, who has taken over the happy town of Piaji. But how do you defeat an enemy who never loses?