Mansuk, a slave of low status, was left abandoned in the mountains immediately after his birth, allegedly for taking the energy of the Samsin Halmae (goddess of childbirth). Luckily, he was rescued by a traveling merchant and journeyed across the eight provinces of Joseon. With his inherent charm and sharp intellect, Mansuk rose to prominence as both a noble hero and a con artist. Holding the belief that 'a swindler faces starvation if he gains fame,' he readies himself for one last major heist. His ultimate aim is to steal the blue and white porcelain that belongs to Lord Park Hanyang, the richest man in Hanyang. However, he is unsuccessful and gets apprehended. Under Lord Park's command, he becomes a 'fake eunuch' and gains access to the palace – serving as the exclusive eunuch for Queen Gyeongye, who is rumored to be even more fearsome than the King!