Provocateur (1998)

Sook Hee (aka Miya) is a North Korean agent who has infiltrated into South Korea in order to steal US military secrets. She is hired as a nanny in the family of US Colonel Greg Finn, who works as an intelligence officer with the US forces in South Korea. Col. Finn's teenage son Chris and Miya fall in love with each other but Miya's North Korean superiors demand that she completes her mission.