The ups and downs in the world, the grievances and hatreds all arise from a dusty old case. Ji Yuege, a young girl who bears a blood feud, steps into the dangerous martial arts world with a simple dagger in hand in order to pursue the truth behind her family's destruction. She was once a carefree "Jinghong", but on the night of the hidden moon, she witnessed the overthrow of her family and was burdened with the name of "Sword Song".
