Katya Lomonosova (a good friend of the heroine Shi Liu in the previous work "Shiji, Rebirth of the City", because the heroine's words became a prophecy) traveled back from modern times to her great-aunt who sacrificed her name in the early days of the Patriotic War. It was less than half a year before the war started. How should she change her destiny and live in her great-aunt's place?
The writer is a "hungry" fan.