In 1986, in Berlin, Germany, Yingmin was an economist who was studying in Berlin. He discovered the chaos in his homeland and decided to defect to North Korea for the future development of himself and his family. During his contact with North Korea, he found that North Korea was just using him, so Yingmin decided not to contact North Korea anymore and no longer considered defecting to North Korea. At the immigration checkpoint leading to East Berlin at Copenhagen Airport, Yingmin's wife and little daughter were captured by North Korean intelligence agents. North Korea asked Yingmin to be a spy for South Korea, and the West German high-level officials also asked Yingmin to be a spy for North Korea. A tense and exciting spy war began...