The plot centers on (Kim Yoo-jung), a resourceful woman who makes a living by cross-dressing as a man and working as a relationship counselor. Through a series of misunderstandings involving love letters written for a client, she encounters Crown Prince Lee Yeong (Park Bo-gum) without realizing his royal status.
as Jo Ha-yeon: An ambitious noblewoman betrothed to the Crown Prince. Critical Success and "Moonlight Syndrome" Moonlight Drawn By Clouds
as Crown Prince Lee Yeong: A charismatic and witty prince who grows into a wise monarch. The plot centers on (Kim Yoo-jung), a resourceful
Driven by debt to loan sharks, Ra-on is forced to enter the palace as a eunuch. There, she becomes a close aide to Lee Yeong, who eventually falls in love with her despite her secret identity. The title itself is symbolic: the "clouds" represent the people, while the "moonlight" represents the monarch. Main Cast and Characters Critical Success and "Moonlight Syndrome" as Crown Prince