The empires vows

They are all from different tribes, aka enemy tribes. They are all best friends. Since grade school. They have secret hang out spots ect, but one of them. Has a big secret (Kimora.). They all turn 16 soon. They are all children of the tribe leaders. Which means they aren't allowed to hang out anymore for their kingdoms and tribe members safety. But they are only 15. But Kimora is planning on betraying them killing them. Before they turn 16. So she can take over the other tribes. No one knows. And when she tried it turns into a big adventure fight and stuff :3