Five hundred years ago, the demon king carried out a massacre of humans. The demon-slayer master desperately sealed the soul of the demon king in a rosary. After hundreds of years of purification, the rosary became a powerful spiritual weapon. Five hundred years later, Yaozi Akao is ready to plot to seize the rosary. During the fight for the beads, the beads were accidentally scattered. In order to save the common people and destroy Akao's ambition, the descendants of a famous demon-slaying family embarked on a journey to collect the beads. Along the way, they started a bloody fight with the monsters, and also began a love story of joys and sorrows.