The song that currency played was the opening of a period drama. The show had been recently airing one hour-long episode every other two days, during the late evening hours.
It told the story of a crown prince who fell in love with the daughter of the Chief Councilor. After the crown prince's uncle rose up to usurp the throne, he was almost caught by the King. In order to escape being accused of treason and dying by poison, the usurper used the girl's father as a scapegoat. Thus, the Chief Councilor was sentenced with beheading and his entire household was turned into slaves, including the man's wife and daughter.
The plot was filled with the usual drama, misunderstandings and tear-jerking moments. Both Su-Jin and Mi-Suk enjoyed watching this period drama mostly for the actors and the romance.