A modern medical student transmigrated into the body of Theresa, the obese queen of the Kingdom of Bolun in the Middle Ages. The original owner had been publicly humiliated at the blessing ceremony and then strangled to death by the white lotus Lia. After being reborn, the female lead was determined to take revenge. Banished to the desolate cold palace, she relied on a cross-time device to purchase modern supplies online and lose weight scientifically, stunning the palace by shedding fifty kilograms in a single month. Coincidentally, the old king fell gravely ill with abdominal pain, and she saved him with modern surgery, firmly establishing her position. Thereafter, facing successive provocations from Lia, the queen dowager, the biased king, and treasonous nobles, she brought out modern high-tech gadgets such as air conditioners, sports cars, and firearms, crushing foreign enemies in a martial arts competition between the two kingdoms, exposing everyone's treason and conspiracies, and severely punishing the villains. In the end, she let go of palace romance, accompanied the old king on a road trip across various countries, and found freedom.