When he was six years old, Su Wan met Shen Ci in the cherry forest. A year later, she chased a butterfly and disappeared into the crack, leaving Shen Ci with half a sleeve and an unfallen chess piece.
Sixteen years later, Shen Ci finally found her. She is already the ice-cold owner of the Yingxiang Valley, using her harp as a weapon to kill people invisible. And the flute in his hand happens to be the key to unlocking all this.
When the zither is killed and the flute is broken, the endgame will be solved. Origination and destruction are all in this situation.