Ye Xiao, a die-hard "brother-pandering demon" (who prioritized her younger brother Ye Xi over all), ruined her 10-year marriage. On New Year’s Eve, she drugged her husband Gu Yanzhi and bestie Moli, staging an affair to frame them—only for the scheme to kill Gu. Ye Xi, who took over Gu’s company, then had Ye Xiao murdered. In her last moments, she regretted her foolishness. Luckily, Ye Xiao was reborn on New Year’s Day, determined to change fate. That day, her past self demanded Gu transfer 5% of Gu’s shares to save Ye Xi’s failing company; when Gu refused, she threw a tantrum. Just as Gu was about to sign to spare their daughter Ling’er, reborn Ye Xiao rushed in to stop it, succeeding. Reborn, Ye Xiao vowed to be a "husband-protecting demon" instead. She used her past-life memories to plot revenge: first, she forged a fake share transfer to trick Ye Xi; then, she found Ye Xi’s mistress Xiao Shan, teamed up with Moli to catch Ye Xi and Xiao Shan in the act. Ye Xi’s fiancée Chu Yunyun withdrew funding from Ye Group after seeing this, humiliating Ye Xi. However, Gu suddenly announced an investment in Ye Group—Ye Xiao later learned Gu had been threatened by Ye Xi. After clearing their misunderstanding, Ye Xiao and Gu united for their "New Year’s Eve plan" to take revenge. On New Year’s Eve, they toasted, and Gu smiled, saying, “Brother-pandering demon, Happy New Year’s Eve.”
