A modern college student dies suddenly after staying up all night and finds herself transported into a disaster-era novel set in the 1950s, where she becomes an overweight, vicious female side character whom everyone despises. Bound to a book-travel system, she must keep her entire family fed to unlock the ability to travel freely between two timelines. While losing weight and turning her life around, she uses modern supplies and knowledge to change their fate, heals the male lead Gu Changjun's leg injury, and strikes back at the original heroine Meng Jiaojiao and troublemaker Sun Guilan, who repeatedly make things difficult for her. She finds drought-resistant wheat seeds and digs a deep well, saving the entire village from a devastating drought. She also helps Gu Changjun seize overseas opportunities and build his business. Eventually, her family's affection reaches its maximum level. Three years later, Gu Changjun returns after establishing his business, and Su Wanqing completely rewrites her tragic fate, gaining a happy family and a fulfilling life.