Wen Lan has lived for twenty-eight years, and the most foolish thing she ever did was marry Shen Yanci, the man who treated her as a stand-in for his first love, Su Wan. She is a gentle, clear-eyed pediatric nurse at the city's First Hospital, but this marriage has drained her of every last bit of warmth. She has watched Shen Yanci turn his obsession with Su Wan into nothing but coldness and criticism toward her. He calls her “Wanwan” in a drunken slur late at night, throws the meals she lovingly prepared into the trash, and rushes off when she's sick just because Su Wan calls. Wen Lan has tried to fight for the marriage, but every heartfelt gesture has brought her nothing but pain.
Then one day, she sees Shen Yanci holding Su Wan, who has just returned from abroad, and treating her with a tenderness he has never shown anyone else. Wen Lan is nothing more than a tool he uses to soothe his obsession. Once she sees the truth, Wen Lan promptly asks for a divorce, packs her bags, and walks out of the prison that has held her captive for three years without looking back. Shen Yanci assumes she's just throwing a tantrum and carries on as usual. But when there are no more hot meals at home, no more lights left on while he is out, and no more sight of that gentle yet resilient woman, he finally comes to his senses: over their years together, he has fallen in love with the woman he treated as a stand-in. Unable to let go, he launches into a dramatic campaign to win her back. But Wen Lan is clear-eyed and independent now, and she will never return. He pursues her in humiliation; she walks away with determination. His belated devotion becomes a painful reckoning and a road to his own redemption. Wen Lan only wants to break free of her chains and become her own guiding light.