Zhang Ruonan

A decade ago, a deadly earthquake almost claimed the life of a high school girl named Xu Lai. It was only the quick thinking and bravery of a young firefighter Jin Shi Chuan that saved her. As he rescued her from the falling rubble, she became smitten with him as they made a comforting "promise" - and when they parted, she resolved to seek him out at all costs.

As four young women enter their journey at the Southwest Communication University, they are met with barriers they must overcome. They continue to have friction due to their personalities and living habits. As they grow and transform together, they finally understand each other and become close friends by relying on one another.