Set during the Joseon Dynasty period, the series follows three people from different walks of life who came together to help Prince Lee Geum claim the throne and reform the Saheonbu.

Unexpected excitement charging romance between Ji-hwan, a big build former gang member who has cleared his dark past, and Eun-ha a mini woman who plays with children for her job.

Someone causes a narcotics unit detective to become addicted to drugs. What is the connection between them?