Overworked medical PhD Lin Xuan gets struck by lightning while working overtime, and upon opening his eyes, he unexpectedly transmigrates into the ancient Su family's matrilocal son-in-law—a good-for-nothing son-in-law who just fell into the water and is bullied by everyone. In his past life, he was overworked to the point of drawing heavenly wrath; in this present life, he vows to sleep until he wakes up naturally, eat when there is food, and play dead when there is trouble. But his cold-faced wife Su Banzha single-handedly supports the precarious medicine shop, while the second branch villains press him step by step. His traditional-and-western medical skills and modern commercial brain simply cannot be hidden. He originally wanted to lie flat and retire, but he is forced to make a move time and time again, reviving the medicine shop, slapping everyone in the face, and stirring the iceberg. Is lying flat fun for a moment, and lying flat all the time always fun? Wife, what are you doing standing so close to me!