In 2000, Zhao Xiaoyu, the daughter of a former sent-down youth, returns to Shanghai, a city that feels both familiar and strange to her.
Between its towering high-rises and the everyday bustle of its alleyways, her career path is full of obstacles.
Her family is cold, her neighbors are warm, and she must tread carefully with every step.
Love casts different shades of light across her life. Sheng Jie, far away in another city, is a ray of light in her heart, but the longing in every letter can hardly fill the emptiness of their separation. Zheng Feng is like a warm hearth, quietly staying by her side when she needs him most and giving her someone to lean on.
When a letter from across the sea quietly appears, it carries not only an unknown secret, but perhaps the key to changing the course of her life. Swept along by the tides of the times, can Zhao Xiaoyu untangle the knots in her family and find a home in love? How will this heartfelt letter guide her toward the future?