In the high walls of Prince Yong's palace, where the turmoil was turbulent in the last years of Kangxi, the modern social creature Jiang Suiwan suddenly died and transformed into a little princess with the least sense of existence. He originally wanted to save money and run away by "lying flatly", but unexpectedly relied on modern skills - opening private takeaways, making homemade anti-pyretic patches, repairing and repairing Western clocks - to quietly make money in the backyard of the palace. Her little fortune was unexpectedly spotted by the cold-faced fourth master Yinzhen, who forced her to become the "accounting lady". From daily necessities to court affairs, she used a bowl of hot soup to dissolve the frost between his brows, and softened his iron-hearted heart with a joke. When the storm of heirloom swept across, she was no longer a bystander, but the fireworks in the world that he was willing to protect under his wings. A sweet love that began with being forced to be bound and ended with each other has quietly turned into a gentle epic of "peace and peace year after year" in the gaps of history.