Eunmyeongui son (1954)'s comments

In this film, North Korean spies use musical sheets to encode their messages. It is known that during the Second World War, the singer Josephine Baker passed messages to the French resistance by writing in invisible ink on her scores. However, in the hand of fate, musical sheets itself is a coded message. Music professor David Loberg of Western Michigan University explains that messages using codes like these would go undetected to an untrained eye and ear. However Since their encryption system is not musical, a sequence of notes with a message hidden inside would look suspicious to a trained eye because it contains musical nonsense.

Margaret is a North Korean spy. She falls in love with a man accused of theft and decides to help him financially. As they begin a relationship together, Margaret finds a military ID card in his wallet making him a spy hunter. Torn between her patriotic duty and her love for him, she ends up handing him over to her boss but refuses to carry out his orders when he asks to kill the spy hunter.

The director being anti-communist, the end of the film shows us how impossible it is for Margaret to obtain redemption since she chose the wrong ideology. However, the dialogue between Margaret and the spy hunter before she dies shows us that their real enemy is neither north nor south but the 38th Parallel.