Ask about the plot of the online movie "Romantic Taoists Fight Witches".

Lan Yongxin, a vain teacher of Yin and Yang, made a living by fortune telling and having an affair, and met the cursed girl Li Qiuxia. After Lan Yongxin helped her break the spell, she died suddenly on the pillow unexpectedly, which led to her sister Li seeking revenge. After learning the truth, Lan Yongxin and Li crossed the barriers of dreams and dimensions and confronted their infertile mothers, ending hundreds of years of disputes.