Ok-tab-bang Wang-se-ja (Rooftop Prince) 1. Sezon 20. Bölüm (Episode 20)

Crown Prince Lee Gak and the trio meet safely in Joseon Dynasty, and once again return to the imperial palace. In order to ascertain the homicide case of Crown Princess, Crown Prince Lee Gak sets up a special investigation headquarter at Uigeumbu, and summons the family of Crown Princess.