Song Ye spent her whole life working hard, all so she could "lie flat." She made a small wish, and never expected it to come true so suddenly. The moment she stepped outside, she went smack and fell flat on the ground.
When Song Ye opens her eyes again, she's become a peasant girl in ancient times. Her family has next to nothing, and money is tight, but luckily, her family is kind and willing to work hard.
Drawing on her sharp eye for business opportunities as an advertising professional and her love of food, Song Ye leads her family in working hard to build their fortune and achieve her dream of lying flat as soon as possible.
PS: Pure food fiction, set in a fictional world, with no historical research needed. Just have fun.