The lone living member of the four-leaf scorpion tribe is Yan Dan. Her entire body has been a treasure trove of medicine from the beginning of time. The largest difficulty of her life—the love trial—began when she and her twin sister Zhixi were able to cultivate into human form at the Queen Mother's Feast a hundred years in the future. Despite having to spend the subsequent 800 years forgetting him, she fell in love with Lord Ying Yuan. However, Yu Mo unexpectedly joined her life at this point and became a huge support for her. Yu Mo brings Yan Dan out to perform nice deeds every day. One day, as they were executing justice, they encountered Tang Zhou, the present-day demon reincarnation of Lord Ying Yuan.
