A reunion full of scars, forty years in the making; a bond forged in lonely solitude thirty years ago. It was a chance encounter with ulterior motives fifty years past. Now, their hair has turned white, and they are well into their seventies. The elderly meet again and look back.
Rational, bright, and strong-willed, Zhou Ziyin meets Yu Xiaochuan on a bus, and the two form a deep friendship. Zhou Ziyuan, who values money above all else, impulsively marries a wealthy businessman more than fifty years old. A wedding invitation sent to the wrong address reveals a secret hidden in her heart. The fragments of Ziyin's childhood memories of her mother, impossible to piece back together, become a mystery she cannot shake.
In the midst of this farce, she meets Ye Chen, Xiaochuan's friend, and the long-suppressed feelings in a woman's heart begin to stir. After Xiaochuan, so wooden and poor at expressing himself, goes on an outing with everyone, his parents insist that he return home with Cheng Xiaoxuan, his childhood companion. Only then is the reason Ziyin has no memories of her mother revealed...
In the sacred hall, Xiaochuan silently offers them his blessings. He remembers taking a photograph of her on that outing, a picture he can never recapture: the girl beneath the deep red maple tree, and the vow made beneath its leaves: Love cannot be controlled. I have the right to love her, and she has the right not to love me. But please respect my love for you!
Every romance is like a roller coaster, and every marriage travels toward its highest point. Once past the peak, the nightmare of plunging downward is inevitable. Only then does Ziyin understand how numb love can make you, until the arrival of someone who brings things to an end...
What will become of Ziyin and Ye Chen? Why do her feelings for Xiaochuan ebb and flow? And how will Xiaochuan face the vow he made to Ziyin?
