Cheng Jiuge transmigrates into a cultivation world. After being saved by Venerable Mingling of the Nanli Medicine Sect, she becomes his disciple. The thousand-yearly marriage alliance between the Nanli Medicine Sect and the Wuji Sword Sect is about to begin. The original choice for the alliance was her senior sister, An Ran, but the reborn An Ran refuses. In the end, she chooses Cheng Jiuge to take her place.
Her prospective husband, Zhongli Xiu, cultivates the Way of Ruthlessness. He's cold and unfeeling, and does nothing but practice his sword and go into seclusion. The Wuji Sword Sect is full of straightforward people who'll start fighting at the slightest disagreement. An Ran thinks her junior sister will have a miserable life there, and feels deeply guilty about it.
But the cold and unfeeling husband An Ran worries about is no problem at all for Cheng Jiuge. After all, the betrothal gifts amount to a hundred thousand top-grade spirit stones. She'd be willing to serve even a husband with a mistress and make the best of it. What's a little coldness?
After marrying into the Wuji Sword Sect, she discovers that her supposedly bargain-basement husband hands out spirit stones at the drop of a hat. Perfect, because her sword loves to eat spirit stones. As for the other disciples of the Wuji Sword Sect, they're all adorably straightforward. And if one isn't adorable, a good beating will fix that. No problem at all.
With her bargain-basement husband keeping her well fed, Cheng Jiuge overcomes one challenge after another and successfully ascends to immortality!