Doeun returned to his past life and the time when his first love, Noun, was still with him. However, in this journey back, his memory of Noun is limited to knowing she is a ghost and not his lover in the sense of a husband and wife relationship. Despite this, he feels a strong connection and begins to question whether the Noun he encounters now is a human or a ghost. He remembers that the Noun he knew as a ghost had already married and given birth to her fourth child. Yet, the Noun he meets in this timeline has not reached that point in her life. Will he be able to change her fate?