Mi firmly believes that marriage is the ultimate proof of true love. She gives her whole heart to Tung, the man she trusts will be her life partner. When their son, Taishan, is born, she sees him as the final bond that will lead her to the altar. Mi waits for the day she can finally have the wedding and legal marriage of her dreams. However, this woman who has everything from wealth to status suddenly finds herself in the position of a mistress when Tin, a mysterious trans woman, appears. Tin claims she was the first love and is also determined to claim the marriage certificate for herself.