Kim Myung-hee is an agent of the Eighth Special Force of North Korea. Since she sneaked into South Korea in 1993, she has assassinated many politicians. Her actions attracted the attention of the South Korean secret service, and sent agents Choi Sang-hwan (Han Seok-kyu) and Lee Jung-hee (Song Kang-ho) to investigate her whereabouts, but she disappeared. In 1998, Kim Myung-hee appeared again. She asked the black market arms dealer Lin Guangchao to help him find a new weapon, the liquid bomb CTX. Lin bribed Jin Zongshu, a researcher at the Ministry of National Defense Research Institute, to help him steal it, but failed. After the incident was exposed, the two were killed by Kim Myung-hee one after another. Because of Kim Myung-hee's failure, North Korea sent a team of agents headed by Bo Wan-kun (Choi Min-sik) to hijack the bomb while the South Korean army was transporting CTX to participate in the arms exhibition, preparing to disrupt the upcoming friendly football match between the two countries. All this makes Choi Sang-hwan, Lee Jung-hee and their boss Minister Gao very distressed. They find that Kim Myung-hee can always find the target before them and sabotage their actions. Kim Myung-hee is right next to them, and perhaps she is the closest and most defenseless person.