Su Chenbi, heir to a secluded medicine valley, is drawn into a series of bloody cases in the capital because of her ability to “know fate through blood.” She is forced to remove the Heart-Eating Gu from Xiao Jinyuan, the young master of a demonic sect, but while investigating the source of the poison, she uncovers the truth behind her family’s slaughter: Xiao Jinyuan is descended from the person who saved her life when she was a child. The two go from using each other to secretly falling in love, only to be trapped in a deadly impasse by the curse that Xiao Jinyuan’s Love Gu will inevitably turn against him and Su Chenbi’s power, which makes her suffer whenever she sees blood. The truer their love, the deeper their wounds. When Xiao Jinyuan exposes his identity as a demonic cultivator to protect her and is hunted by the righteous sects, Su Chenbi uses her blood to alter the course of fate, only to discover that every conspiracy began with a “life-swapping pact” made when they were both infants. Their tragic romance culminates in an ultimate choice: either live together, or die together. (Highlights: supernatural abilities heighten the tension of the tragic romance; the double restraints of “suffering through blood” and the Love Gu’s backlash create thrilling reversals; the truth behind the family massacre and the pact of destiny are intricately intertwined.)
