The One Who Cannot Be Forgiven

King Cheoljong makes a move against both the Kim and Jo families by convincing Queen So Young to select three concubines from other powerful families. Confused by her growing feelings towards the King, Queen So Young decides to reclaim his/her identity by flirting with the new concubines. Things don't go as planned when unknowingly and unintentionally, she starts a letter exchange with the King. Meanwhile, as the King organizes a banquet for the Queen, the Kim family retaliates and Concubine Hwa Jin makes a bold move.