Transmigrated into a cannon fodder character who gives the female lead a cheat ability in a period novel

Su Ying, a modern woman who had inherited a large fortune and a mysterious spatial dimension triggered by her parents' engagement ring, finds herself in a fatal car accident that sends her consciousness back in time. She awakens in the body of a十八-year-old girl with the same name, who had just died from emotional agitation after discovering her stepmother's plot to send her to the harsh Northeast countryside to die and inherit her property. Su Ying realizes she has transmigrated into a novel she previously read, where the original owner was merely cannon fodder whose death allowed the female lead to obtain a magical space ring. Armed with her own spatial dimension filled with ten years of supplies and gold, Su Ying resolves to change her fate and deny the female lead her golden finger.

The core conflict centers on Su Ying's struggle against her stepmother, Chen Zhaodi, and stepsister, Su Lai, who are greedily searching for her property certificates and passbook. Su Ying reveals that her late father had left everything to her, including a house where Chen Zhaodi is only permitted to live if she remains unmarried. In a decisive move, Su Ying counters her stepmother's scheme by signing Su Lai up for the countryside instead, sending her to the warmer but labor-intensive Guizhou province. She also sells her father's arranged hospital job to a neighbor, Wang Jinfeng, securing funds and tickets while establishing a contact who will monitor Chen Zhaodi's marital status. Su Ying then visits the black market, exchanging high-value items from her space for jade jewelry and other goods, demonstrating her ability to navigate the era's economy using her future knowledge and spatial advantages.

A key turning point occurs when Su Ying activates the complete version of her space by merging her mother's jade ring with her own space ring. This transformation expands her domain from a simple farmhouse to a traditional Siheyuan courtyard with a self-refilling well that possesses beautifying and health-enhancing properties. The well water not only improves her physical appearance and strength but also stabilizes the space's resources, giving her a significant edge over the novel's female lead, whose space was incomplete and whose resources would diminish with use. Su Ying uses this advantage to prepare for her departure, mailing supplies to her destination and ensuring she is well-equipped for rural life.

During her train journey to Heilongjiang Province, Su Ying encounters Liu Qiyue, the reborn female lead of the novel, who is attempting to forge a friendship with Su Ying to repay a past kindness and alter her tragic fate. Liu Qiyue's overzealous behavior, including demanding silence from fellow passengers to protect Su Ying's rest, backfires and alienates the crowd. Su Ying firmly rejects Liu Qiyue's presumptuous friendship, asserting her independence and distancing herself from the original plot. Upon arrival, Su Ying manipulates the brigade assignment lottery to secure a place in the First Brigade, the most desirable unit in the commune, rather than the Third Brigade where Liu Qiyue is assigned. The First Brigade captain, Jiang Zhongyi, offers a tolerant environment that allows educated youths to remain if they do not fall in love with locals, providing Su Ying with the stability she needs to wait for the restoration of the college entrance examination and her eventual return to the city.