"Double Heart Tribulation" revolves around Ling Wuxue, who practices the ruthless way, and Shen Zhiyi, who practices the compassionate way. The two once became Taoist couples, and because they were Taoist twins, they were each other's inner demons.
In the first volume, on the eve of Ling Wuxue's ascension, Shen Zhiyi failed to survive the catastrophe and fell to the same place. She imprisoned him in the Love Lock Tower, but she aroused the inner demons. When Dao Tong put pressure on her, Shen Zhiyi protected her from being injured. The two broke into Wangchuan Cliff, and Heaven forced them to kill each other. Ling Wuxue saw that he had scars on his chest, and there were cracks in Dao's heart.
In the second volume, the two live in seclusion at the bottom of a cliff, and old letters reveal the secret behind their breakup. Xuanjizi said that the two ways needed to merge with the incomplete way of repairing the sky, so the Taoist system deployed a double-killing array. Shen Zhi intends to break the formation with his own body, and Ling Wuxue understands the meaning of Tao Xin and joins forces to break the formation. The cold crystal shatters and thunder disaster comes.
In the third volume, Ling Wuxue and Shen Zhiyi, who have lost their Taoist hearts, coexist in a secret realm and understand new laws. Daotong pursues him, and the two of them face the enemy side by side. When the incarnation of heaven comes, they fight with "humanity" and defeat the incarnation. In the end, he gave up his ascension, spread his strange way to the world, and became a legendary hero.
