Modern gold-medal assassin Wu You unexpectedly transmigrates into Wu Youyou, a bullied mute peasant girl in the Dayu Dynasty. Upon waking, she faces oppression and persecution from vicious relatives. Relying on her portable space and system, she separates from the main family to stand on her own with her grandmother and younger siblings, heals the sick, gets rich through commerce, builds a manor, and grows high-yield crops, counterattacking step by step. Along the way, she saves the mysterious God of War Helian Qingcheng, who is infected with a rare poison. Amid bickering and companionship, the two develop feelings for each other, joining hands to protect their family, build their enterprise, and stir the winds and clouds.