The lobby manager, Tu Xiaoning, who works on the first floor of Huayuan Tower, is in a crucial period of probation. Ji Yuheng, a talented young man working on the seventeenth floor of the tower, is a rising star in the business. They share a common desire to get married as soon as possible, and this is where two parallel lines intersect.

In Xiaoning's eyes, Yuheng exceeds expectations as a marriage partner. In Yuheng's eyes, the youthful Xiaoning once illuminated his life, and marrying her is his only firm choice. Just as the two muster the courage to establish their marital relationship, Yuheng unexpectedly becomes Xiaoning's superior. These childhood friends from ten years ago, through a twist of fate, find themselves in a dual relationship as colleagues and newlyweds. They work together to explore the meaning of marriage and life.