Deep in Zhongnan Mountain lies a secluded valley, unvisited for a hundred years, with a lone cold sword and a lifetime of solitude.
The young Yun Xun, adrift and without a home, suffers the sect's contempt and abuse, cast aside by the world like a worn-out shoe.
With nowhere left to turn, he strays into a forbidden valley and meets the white-robed immortal maiden Su Qinghan, the coldest and yet gentlest woman in the world.
She has guarded the secluded valley in solitude for a thousand years, untouched by worldly affairs and indifferent to love. Yet she takes in the destitute youth alone, teaching him swordsmanship and keeping him company day and night.
Master and disciple stay together, cultivate with cold jade, and spend every day side by side, until love quietly takes root.
He is the only person in the world to bring warmth to her lonely years.
She is the only place willing to take him in after half a lifetime of hardship and wandering.
Then turmoil erupts in the mortal world. The orthodox sects hunt them down, rumors rage, and the world will not tolerate a love between master and disciple.
People call them evil heretics who defy the Way and violate the proper order.
The covetous and the powerful, the great clans' oppression, and the pursuit of the martial world descend one after another.
The secluded valley crumbles, and the two are forced to flee for their lives.
One, clad in blue and bearing a sword, shields her through endless storms and snow.
The other, clad in white and holding fast to her heart, follows him across the world.
Even if the righteous and the wicked cannot coexist and the whole world stands against us, I will hold my sword to protect you. I will never fail you in this life, and we will face life and death together.
Thus begins a passionate period martial-arts romance that crosses the bounds of master and disciple and defies every convention.