Feathers will fall

In the land of tribes way up in the mountains lives a young teen. Throughout his life he has been raised to become the next chief after his mother retires. But when a threat rises for all the tribes in the mountains and his mother is killed in battle ... becomes chief.
Will he rise to the challenge?
Will he convince the tribes to rethink there ways to save them all from doom?
Or will ... crumble under the pressure of this thrust upon responsibility?