Kenshin

In ancient times, when the world was first divided, the Righteous Sword Immortal used his sword heart to condense the "Sword Heart Stone" and sealed the demon leader who attempted to invade the three realms. As a result, the Sword Heart Stone scattered across the three realms and turned into nine fragments, which were guarded by major forces. Thousands of years later, the forces of the demon world revived. The old man in black robe led the remnants of the demon world to search for the fragments of the Sword Heart Stone in an attempt to unblock the leader and restore the glory of the demon world. Frequent phenomena occur in various places in the three realms, evil spirits spread, and the world of immortality is plunged into turmoil. Ling Xuan, the chief disciple of the Qingyun Sect, was attacked by a black-robed old man during a training trip down the mountain. The sect was destroyed, and he was the only one who survived. On the way to escape, Ling Xuan encounters Yun Lan, a descendant of the Lingyin family. Yun Lan is being hunted by dark forces. The two become partners because of their common enemy. Ling Xuan learned the secret of the Sword Heart Stone from Yun Lan, understood the conspiracy of the Demon Realm, and determined to collect the fragments of the Sword Heart Stone to prevent the Demon Realm from resurrecting.