A car accident caused Su Wan to lose her memory. When she woke up, her ex-husband Lu Chengyuan, who had been extremely indifferent to her, protected her in his palms with red eyes and accommodated her in every possible way. He recreated for her the gardenia garden that "Bai Yueguang" liked, took her to relive the seaside where "the two of them" had been, and kept in mind even the little habits she casually mentioned.
Su Wan was immersed in this belated tenderness, but she always found flaws in the details - in the old photos he gave her, the woman's profile was very similar to his own; the name he muttered when drunk was never "Su Wan". Until one day, she found a diary in the study. The handwriting on the title page was strange yet familiar. It recorded Lu Chengyuan's obsession with another woman. The photo in the diary was of herself before the car accident, with a haggard face.
When the memory fragments suddenly came together, Su Wan was shocked to realize that she was not the Bai Yueguang that Lu Chengyuan had recovered, but the "substitute" he had forced to stay by his side using the excuse of amnesia. And the tenderness that made her heart beat were all the drama he performed for "White Moonlight". Facing the truth, should she expose this scam and escape from this man completely, or should she find the sincerity that belongs to "Su Wan" that was once ignored in the intertwined love between true and false?
