Kaena: The Prophecy (2003)

Axis, a gigantic coiling plant, stretches high above the clouds. At its center is a village whose people are in mortal danger, because Axis is withering and its sap is drying up. The people beg their gods for help, but to no avail. Compelled by a mysterious force, rebellious, high-spirited teenage girl Kaena defies the High Priest and her people's ancestral beliefs to take the perilous journey through the Axis and discover what dark secrets lie beyond the clouds. A dying world, an evil force, a terrible secret.