The elements.

Once there were four tribes, they were all friends, they lived in harmony. Then one day something happened, nobody knows what, and know the tribes all hate each other, that is until the princess of the earth tribe, willow, goes on a quest to find our what had happened, but she couldn't do it alone, so she gathered together gifts for the princess of the water tribe(blear), prince of the air tribe ( skyler) and the prince of the fire tribe (damon). They all head of to find out what had happened but along the way all they find out is that, they are all the same, they would make great friends and even some fell in love. Once they found out what had happened years ago they don't care so they make a secret friends club with just the four of them and all promise that once they become leaders of there tribes they will all live in peace. No matter what.