The female ancestors of the Li family were witches. The earliest matriarch, out of doting love for her adopted son, delayed a decisive battle that would determine humanity's fate—and was punished by the strongest witch in the clan with a bloodline curse. The cursed branch was stripped of its witch powers and reduced to ordinary people who could bear children. The firstborn must always be a daughter; if a male is born afterward, the curse erupts in full. The curse: the family's direct female relatives will, through a series of strange twists, commit incest with this male until conception occurs. Li Bin is the first male born into the Li family in many years, and as he comes of age, the family curse is triggered.