To save her declining family, Lin Qingyan agrees to a contractual marriage with Gu Chengye, a powerful figure in the imperial capital, as a stand-in for his “white moonlight.”
Gu Chengye is cold and domineering, already consumed by an obsession. He sees the marriage as a way of transferring his feelings for the woman who once saved his life. Su Wanqing holds the token of their bond and steps in as the “real one,” weaving one misunderstanding after another. Meanwhile, Gu Zhenhai, Gu Chengye’s uncle, secretly schemes for power, turning the truth that Lin Qingyan is the rightful heir to the Gu family who was lost to them into a secret buried beneath layer upon layer of lies.
As this game of mistaken identities between substitute and original unfolds, Gu Chengye gradually falls for the quiet strength beneath Lin Qingyan’s gentleness. When the lies come to light, he finally realizes that he has lost both his true moonlight and his heart. Amid the turmoil of identity and genuine affection, can Lin Qingyan hold on to his kindness and find the love and home he deserves?