He is the world-famous Hidden Emperor, who single-handedly settled troubled times and established unparalleled achievements. However, when he succeeded, he was tired of the power struggle and chose to fake his death to escape, secluded into a small town in the south of the Yangtze River and became an ordinary doctor. He just wants to collect medicines and consult doctors, farm and raise flowers, and live an ordinary life again. But the tree wants to be quiet but the wind is not stopping. The town is undercurrent, bullies are rampant, business gangs are at war, and even spies from the capital appear frequently. He resolves crises time and time again in a low-key manner, but always shows his edge at critical moments, which is surprising. He originally wanted to escape the world, but inadvertently got involved in a larger whirlpool, and discovered that behind all of this there was a shocking conspiracy that could overthrow the dynasty. When the veil of peace and prosperity is torn apart, can his secluded life continue? Let's see how Emperor Yin, with his benevolence as a doctor, carries out the emperor's plan, protects the peace of a place, and then stirs up trouble.