▁in ▁recover ing ▁the ▁portrait , ▁over coming ▁hur d les ▁and ▁dangerous ▁tra ps ▁set ▁up ▁by ▁enemies . ▁The ▁recovery ▁of ▁the ▁painting ▁also ▁helps ▁reve al ▁the ▁secret ▁behind ▁the ▁death ▁of ▁Se o ▁J ing , ▁who ▁is ▁actually ▁Shin ▁Y un - b ok ' s ▁father . ▁In ▁the ▁process , ▁Kim ▁Hong - do ▁real izes ▁that ▁he ▁is ▁truly ▁in ▁love ▁with ▁Shin ▁Y un - b ok . ▁However , ▁he ▁tries ▁to ▁leave ▁him ▁because ▁he ▁knows ▁that ▁the ▁affair ▁would ▁be ▁an ▁impossible ▁one . ▁But ▁to ▁everyone ' s ▁surprise , ▁the ▁truth ▁is ▁revealed . ▁Shin ▁Y un - b ok ▁is ▁actually ▁a ▁woman . ▁She ▁had ▁dis gu ised ▁herself ▁as ▁a ▁man ▁to ▁enter ▁D oh w ase o , ▁an ▁institution ▁limited ▁only ▁to ▁males , ▁in ▁order ▁to ▁un cover ▁the ▁truth ▁about ▁her ▁father ' s ▁death . ▁ ▁Cast ▁ ▁Main ▁Cast ▁Moon ▁Ge un - you ng ▁as ▁Shin ▁Y un - b ok ▁Kim ▁Y oo - j ung ▁as ▁young ▁Y un - b ok ▁Park ▁Shin - y ang ▁as ▁Kim ▁Hong - do ▁Ry u ▁Se ung - ry ong ▁as ▁Kim ▁Jo - ny un ▁B ae ▁So o - bin ▁as ▁King ▁Je ong jo ▁Moon ▁Ch ae - won ▁as ▁Jung - hy ang , ▁a ▁g isa eng ▁ ▁Support ing ▁Cast ▁ ▁Lee ▁Jo on ▁as ▁Shin ▁Young - b ok ▁Lee ▁By