Dong Yue goes back into the past to try and change history but has no memory of who she is and why she is there. She foils an assassination attempt on Feng Xi and he gives her the name Dong Yue. She has a magical flute that plays music on its own. She gets some of her memory back and realizes she is there to kill Lu Yuan Tong but is killed by Feng Xi instead. However, her prediction about someone dying ends up being true. (Source: jindreame at MyDramaList)