A once-mighty Immortal Venerable unexpectedly falls into another world's mortal realm, with his soul inhabiting the body of a live-in son-in-law of the Fan family. Just as he awakens, a divorce letter is delivered before him. Once a powerful being who commanded the Three Realms, he suppresses his overwhelming cultivation and calmly faces family criticism and worldly conflicts. Quietly biding his time amid ordinary mortal life, he gradually uncovers the mysteries surrounding him and resolves one crisis after another, waiting for the right moment to resume his long journey on the path to immortality.