Modern heroine Jiang Sui accidentally transmigrates into a book, turning into an ordinary peasant adoptive daughter. To escape the predicament, she actively substitutes in marriage, marrying Xiao Hechuan, whose mind is like a child's. After marriage, relying on modern business ideas and culinary arts, Jiang Sui uses unsellable sweet potatoes to make spicy and sour noodles at a street stall, leading the impoverished Xiao family step by step to wealth. During this time, she resolves sister-in-law conflicts, exposes outsiders' malicious teasing, and also saves the fallen cliff famous doctor Su Yanqing, forging a good match, and helps family members diagnose and treat stubborn ailments. Foreseeing a severe drought is coming, she hoards grain in advance to avoid risks, firmly protects the Xiao family, and lives a stable and peaceful life with Xiao Hechuan, who protects her with all his heart.