Based on a screenplay by the prolific Kim Ki-duk. Two families live next door to each other in identical suburban white houses with green lawns. One family is from South Korea, the other is a fake family assembled from North Korean spies. The North Koreans must strictly obey every order from their regime, who holds their real families hostage. The problem is that the families affect each other and after a while, the political rift in the North Korean house becomes apparent. Naturally, there also occurs cross-border romantic entanglements between old and young alike.

Soon after Ji-won gets a new cell phone, her friend’s young daughter, Yeong-ju, puts it to her ear and immediately begins screaming in terror. When other strange things start happening in connection with the phone, Ji-Won does some investigating and discovers that of the people before her who had the same number, almost all of them died suddenly under unusual circumstances. As Yeong-ju’s behavior becomes increasingly alarming, Ji-won digs deeper into the circumstances surrounding the disappearance of the number’s first owner, a high school girl named Jin-hie.