Chen Yu and Su Mian were once lovers who loved passionately but were forcibly separated due to class differences. Seven years ago, Chen Yu came from a humble background and was a talented architecture student with an uncertain future; Su Mian was a pearl protected by a wealthy family. The Su family's firm opposition eventually separated the two through a well-planned misunderstanding and a deal. On the eve of the breakup, Su Mian became pregnant with a child by accident. She chose to give birth to her daughter "Nian Nian" alone, and told Chen Yu that the child had been "disposed of" under the arrangements of her family.
Seven years later, Chen Yu has become a famous architect, possessing wealth and status that were once despised by the Su family, but his emotional world is in a barren state. Su Mian became an excellent children's book editor, raising her daughter alone, living a peaceful life but always carrying a deep regret.
The turning point of the story comes from their "child created together" - Nian Nian. Six-year-old Niannian was diagnosed with a rare blood disease and needed a related hematopoietic stem cell transplant, but Su Mian's match was unsuccessful. Desperate, Su Mian had to break seven years of silence, find Chen Yu, and tell him the truth: he had a daughter, and the child was dying and needed him.
This sudden news, like a bomb, shattered all the disguises Chen Yu had successfully built. The shock and rage at the deception were intertwined with the complex emotions of becoming a father for the first time. He resolutely intervened in his daughter's treatment. In the cold hospital corridors and during the days when they were working together to raise exorbitant medical expenses, two adults who had long been strangers were forced to re-examine each other and the past.
