There is a rusty ancient sword hidden in the delivery boy Shen Mo's backpack. During the day, he traveled across the city to earn his sister's medical expenses, and at night, the rusty sword murmured faintly in the darkness. When the token of the world of cultivation reappears in the world, the cause and effect of the past comes to visit again, and he must make a choice between the mortal life and the fate of the Sword Immortal - and it all started from that rainy night, that weird teahouse, and that greeting a hundred years later.
