Busan, Korea. Silhouettes of two men wearing long coats appear in the dark. These silhouettes were ones of Taka and Yuji, both who disappeared years ago in the sea at Yokohama after a bombing. As undercover cops, they were now following a huge scaled deal. Nuclear Weapons. And these weapons have been snuck into Japan. The two return to Japan for the first time after their disappearance from the Yokohama Port, but they get attacked by rifle bullets. Two young cops rush to the scene, and Taka and Yuji both get taken away. The police station they were brought to was their old work place. Many familiar-looking faces seem surprised to see their former associates. Taka and Yuji are even more surprised to learn that Bitoh, a bank robber they caught 7 years ago, broke out of prison. It seems that Bitoh is the one who attacked them earlier. Taka and Yuji, along with the young cops, Mizushima and Kanuma, go after Bitoh.