In the 1950s, Rong Yu, a scientist returning from studying abroad, stepped onto her homeland and reunited with her young son, Yingbao. An unexpected accident caused her to unexpectedly cross seventy years of time's long river, plunging into a rapidly changing new era. Following old clues, she found the Yingbao in her memory, who at this time was already a white-haired chairman. Rong Yu, with her learning and moral character, resolved to help Yingbao, leading descendants to reorganize the family.