A sudden hospital fire caused chaos and buried a secret that lasted forty years.
Amid the smoke and panic, two baby girls born at the same moment were held in the wrong arms. When Shen Meilan, a pregnant woman in a poor Tongzi Building, discovered the truth, what surged in her heart was not the urge to correct her mistakes, but a private thought that would involve her in guilt and fear for the rest of her life. She silently chose to make do with her mistakes and let her biological daughter live in the "Gaozhi Building" she dreamed of for her, to embrace a bright future that she was unable to give. For forty years, the two girls grew up and struggled on misaligned life trajectories. This is not a simple story of a strange combination of circumstances, but more like a human experiment with cruel truth.