Eunuch (1986)

Jeong-ho is castrated by an ambitious minister for loving above his station. The minister also happens to be the father of Ja-ok, the girl Jeong-ho loved. He sends his daughter to the king as a concubine in a bid to gain favor, but the king sees through his motives and the instead forces Ja-ok into the position of a lowly kitchen maid. Jeong-ho sole hope in life is to save his former lover.