After Earth's shattering, Seijins inhabit Skyland under the Sphere's dictatorship. When Mahad and Lena's mother is captured, they join rebels fighting the Sphere's control of water.After Earth's shattering, Seijins inhabit Skyland under the Sphere's dictatorship. When Mahad and Lena's mother is captured, they join rebels fighting the Sphere's control of water.After Earth's shattering, Seijins inhabit Skyland under the Sphere's dictatorship. When Mahad and Lena's mother is captured, they join rebels fighting the Sphere's control of water.