You Took Your Widowed Sister-in-Law to War? I Married a Billionaire and Had Triplets!

Su Sihe, a sent-down youth from Beijing, is reborn into her past, returning to the moment she had previously discovered her fiancé Cheng Qiguang and his widowed sister-in-law Lin Wanqing in an adulterous embrace. In her previous life, her confrontation led to her being injured and forced to apologize to the lovers, a submission that marked the beginning of ten years of torment ending in her poisoning. This time, Su Sihe resolves to break the engagement and escape the Cheng family. She publicly exposes the affair, causing a scandal that forces the village chief to intervene. Rather than reconciling, Su Sihe firmly rejects Cheng Qiguang’s pleas and secretly contacts Zhou Huaijin, a soldier and her other fiancé, arranging to marry him within seven days to secure her escape.

Cheng Qiguang, desperate to protect his military career and promotion, conspires with his family to discredit Su Sihe. When Su Sihe remains unmoved, Lin Wanqing stages a fake suicide by jumping into a river, attempting to frame Su Sihe for harassment. Su Sihe, however, uses her knowledge of the past to dismantle the ruse. She points out the physical inconsistencies in Lin Wanqing’s mud-covered clothes and Cheng Qiguang’s attire, proving they staged the scene. The exposure humiliates the Cheng family, but Village Chief Cheng, Cheng Qiguang’s uncle, manipulates the situation to shift blame onto Lin Wanqing, who is forced to take the fall to save her brother-in-law’s reputation. Despite this tactical victory, Su Sihe faces retaliation in the form of excessive labor assignments and harassment from Cheng Qiguang’s younger sister, Cheng Meili.

Refusing to be broken, Su Sihe enlists the help of her friends, fellow educated youths Zhou Manling and Zhao Fen, and allies with the rival production team leader, Zhang Jianjun, to counter the Cheng family’s influence. The conflict escalates when Cheng Qiguang and Lin Wanqing devise a more dangerous plan: they lure Su Sihe to their home under the pretense of returning her belongings, intending to drug her and frame her for an affair with a village simpleton named Er Sha. Su Sihe anticipates the trap and goes anyway, turning the scheme against them. She allows herself to be pulled into the room but manages to raise the alarm, ensuring that witnesses, including a visiting commune secretary, arrive to find the simpleton fleeing and Su Sihe appearing battered and traumatized.

The arrival of Secretary Li, who was already tasked with investigating the treatment of Beijing youth, changes the dynamics entirely. Su Sihe accuses Cheng Qiguang and Lin Wanqing of attempting to assault her. The simpleton, coerced by Lin Wanqing with candy, initially implicates her, but the chaos leads to Lin Wanqing breaking down and accusing Cheng Qiguang of orchestrating the frame-up. The Cheng family turns on itself, with Cheng Qiguang’s mother attacking Lin Wanqing while he remains passive. Faced with the severity of the accusation and the presence of higher authorities, the village chief orders Cheng Qiguang and Lin Wanqing to be taken into custody for investigation. As they are dragged away, Lin Wanqing vows to drag Cheng Qiguang down with her, signaling that the internal collapse of the Cheng family is just beginning. Su Sihe, now free from the immediate threat but still in a hostile environment, prepares to wait out the remaining days until Zhou Huaijin arrives to take her away from the village.