A Zhen, a girl who ran away from home, came to a small town by the sea, looking for her biological father whom she had never met. She met three brothers in the town: A Han, Ating and A Liang. The mother of the three brothers was seriously ill and had been recuperating in a sanatorium for many years. Every day, their father would pull a rope and take the three brothers to the sanatorium to see their mother. Day after day, until the news of their mother's death came from the sanatorium... The summer sky was scorching and the sun was shining. After A Zhen had been with this family for a few days, her mother suddenly visited, breaking the tranquility of the town. It turned out that the purpose of A Zhen's journey seemed to be more than just finding her father...