Fated

Years after Mother Earth unleashed her wrath on the abusive human ways, the people left after the apocalypse decided to return to much simpler times. In one country, only four tribes divide it: agriculture, education, magic, and battle. Each one has a simple purpose yet they rarely get along so a tradition of marrying two of the best youths in one tribe to two others from a different one every ten years had been formed for the sake of peace. In the 10th time for it to take place, the youth would have to make a decision whether to keep the practice alive or make some changes.