In 2003 Song Du-yul, a philosophy professor, decides to go back to his homeland after spending thirty-seven years in Germany. Within a week after crossing the border, his reputation falls from a respected global political figure to an infamous communist spy. During a five-year-long trial, he was arrested and held in custody. This throws Korean society into turmoil and brings a big conflict between the Conservative and the Progressive parties. The filmmaker calmly contemplates this long period of the incident in detail and depicts a society with an indifferent manner. The story builds through an accretion of whimsical facts and it sometimes brings up uncomfortable truths which will irritate viewers. This film is a camera inside of us that evokes what viewers may have tried to forget.

Professor Song, staying in Germany, was suspected of espionage and banned from Korea. Now he's expecting to visit Korean after 33 years. The Border City', by whech Berlin was called during the period of partition, could also be a name for Seoul naw that the city is haunted by the 'red complex' and refuses Prof. Song to come back to his homeland.