When Li Yuhe, a rail road worker who was engaging in underground work, was taken away by special agents and Grandma Li has a premonition of being arrested, Grandma tells Tiemei the true story about her family; she expects the girl to be a strong willed person just like her father. Grandma Li then tells Tiemei how her parents have sacrificed their lives in the revolutionary struggle. Li Yuhe has taken up the unfulfilled task of the martyrs. After hearing the heroic story about her family. Li Tiemei is determined to follow the example of her father and carry the revolution through to the end.