Ke Yi, an aerospace researcher, died protecting her infant son Yingbao in 1955. Then she passed through the spirit of a high school student of the same name in 2025. When she learned that Yingbao was critically ill, she rushed to the hospital and reunited her mother and son. The 18-year-old grandmother used her experience and skills to protect the Ji family. She saw through the plot of commercial spy Liu Ruyan and found the real fourth son of the Ji family. She also used acupuncture to cure the third son of the Ji family who had become stupid after being killed by hostile forces. After reading the original person's diary, he participated in the singing competition and won the championship; starring in the aerospace-themed drama led by the Ji family, he not only fulfilled the original person's regrets, but also continued his own feelings about aerospace. The bad guys were punished, the Ji family conflicts were resolved, the Ji family's aerospace project progressed steadily, and Ke Yi finally fulfilled his promise to protect the family.
