In this country live beautiful creatures sharing aspects of both birds and people. They're called Zhen, and their utmost pride lies in the vivid hues of their wings, born from the toxins of the poisonous foods they love to feast upon.But with ugly colors unfitting of proper Zhen, both Liu Xin and Zhiye found themselves unwanted no matter where they went.Together, the two of them formed a powerful bond - except one day, Liu Xin's behaviour suddenly changed...?