A thousand years ago, Ning Yechen, the Demon Venerable who unified the Six Realms, grew weary of endless conflicts and went into seclusion in a valley in the mortal world. By a twist of fate, he became involved with Luo Ruying, a fallen Holy Maiden from the Immortal Realm. Ten years later, Luo Ruying arrives searching for him with their daughter, Ye Ye, gravely injured and pursued by enemies. Concealing his true identity, Ning Yechen secretly protects his wife and daughter, accompanying them back to the Immortal Realm to face challenges from all sides and the schemes of the Great Sun Immortal Court. After overcoming countless dangers, he protects his family and clears their names. In the end, the three return to the mortal world and live a peaceful, happy life in seclusion.