In her previous life, Feng Qingyu was murdered by her junior brother Ling Jue and her "good junior sister" Su Ling'er. Their Taoist foundation was taken away and she died with hatred. On the day she was reborn as a contracted spirit beast, she decisively chose the inconspicuous black snake. From then on, the senior sister was no longer kind. She worked step by step, exposed the conspiracy, and practiced against the will of heaven. When Ling Jue once again held the blood-stained elixir and begged her to turn back, and when Su Ling'er's true face was revealed to the public, the black snake behind her who always liked to call himself "I" finally took off its disguise, revealing the peerless edge of an ancient true dragon. He protected her in his arms and declared to the world: "Anyone who hurts my wife will be destroyed."
