Orphaned teenager Jack is looking for a weapons master to learn how to defend the weak. In a dark forest, he stumbles by accident on a high tech device that calls itself Xyber 9 and that evil overlord Machestro wants.
Jack and Xyber 9 arrive in a town plagued by a deadly monster. There, Jack meets Ikira, a legendary swordsman who fell from grace, and Roselyn, the pretty daughter of Machestro's right hand King Renard.
Jack and Anakonda team up with Queen Tatania, King Renard's archenemy, and join her on her flying battleship to discuss what to do next. An accident occurs and Jack and Xyber 9 are suspected of sabotage. Jack must find the real traitor.
Jack asks Anakonda and Roselyn to help him destroy the powerful ancient electrical weapon called The Ring of Thunder that Roselyn's father King Renard is piecing back together again. However, the girls hate each other.
Jack, Mick and Willy find a treasure map in King Renard's fortress. The map leads to the cave of the Golden Masquerade and the golden idol of Tereus. They team up with Mick's old partner Slick, even though Xyber 9 doesn't trust him.
Ancient device known as the Seed of Light can raise a forcefield that Machina, Machestro's people, can't pass through. However, before he can use it, Jack must first reunite his team when infighting starts tearing them apart.
Jack and Xyber 9 discover that the Machina are sensitive to sunlight. The Machina believe that this is due to them being cursed, but it's actually a disease that can be cured. Ikira tries to use this information for good.