.Hei tiānshî is sealed in the North Pole,in the silence of being forgotten by everyone.Yilin is sealed in the South Pole and gets observed by the sirens,they miss hei tiānshî since then and waits of hope to get united with hei tiānshî. Now centuries after that incident,Yilin got freed.as they got freed of their prison(frozen in ice),they fell to ground.yilin was wet because of the ice and breathed heavy because of the cold and tiredness.