He is a sword cultivator and is dedicated to swordsmanship.
But then he met a special person (the protagonist who traveled through time). From the moment he fell in love with that person, he could no longer pick up the sword in his hand.
Because he lost his sword. But he didn't know that his own sword had a spirit.
Because the spirit sword was abandoned by him, it turned into a demon and counterattacked the protagonist to transcend the world.
In order to continue practicing, the spirit sword entered the three thousand worlds to help people fulfill their wishes.