Our Sister Hedy: The Kong family has four daughters. Hilda, the eldest sister, assumes the role of a mother and often lets romance slip by. Third sister Hedy introduces her to Sun Ruhao, an engineer, but Sun is snatched by second sister Helen. The youngest girl Hazel drops out of school in pursuit of love. Hedy shows no interest in romance but is chased by a rich heir, He Yan. Meanwhile, Hilda runs away to meet her true love in a foreign land. As for Hedy, she is at last won over by He.