The life of jewelry designer Su Wanxing was suddenly hit hard: his mother suffered a cerebral hemorrhage and required 150,000 yuan for surgery, his father's studio was on the verge of bankruptcy due to arrears of 800,000 yuan, his former lovers were estranged, and relatives and friends were unable to help him. When he was desperate, the lawyer of Lu Shiyan, the president of Shiyan Group, brought a turning point - 1 million to pay off all debts, on condition that he sign a two-year contract marriage and act as his "wife" to comfort his seriously ill grandfather.
It turns out that Grandpa Lu never forgets his first love, and Su Wanxing's facial features are very similar to that of his old friend. In order to save her mother and preserve the family's hard work, Su Wanxing gritted her teeth and signed a contract to live in Lu Shiyan's cold penthouse apartment. While cooperating with him in family gatherings and business occasions, she maintained the illusion of a "loving couple" while adhering to her design dreams and preserving her own bottom line.
This transaction started with profit, but quietly deteriorated in daily life: Lu Shiyan seemed indifferent, but he would silently reserve a studio for her and remember her favorite breakfast; Su Wanxing originally only wanted to be a "qualified actor", but when he was running for his grandfather and shielding her from crises, we glimpsed the tenderness under his cold appearance.
Underneath the calm, there is a turbulent undercurrent: Lu Shiyan's childhood sweetheart, international jewelry designer Lin Weiwei, returns to China, pointing out Su Wanxing's "substitute" nature and full of hostility; Grandpa's accidental actions put the truth at risk, and Su Wanxing's concealment from his family may be exposed at any time.
When the shell of the contract loosens and sincerity and interests are pulled apart, can Su Wanxing and Lu Shiyan break through the shackles of "substitutes"? Will this encounter that started as a transaction end two years later, or will it turn into each other's starlight, illuminating the rest of our lives?
