As a child, Shimazaki Shingo was kidnapped by an international terrorist organization and raised as their fighting agent. After 30 years had passed, he finally managed to return to his peaceful hometown in Japan. His Japanese may be awkward, and his grasp of ordinary tasks a little weak, but he has all the combat and surveillance training of a green beret. There are many kindhearted souls who want to help him - and a few not so kind ones who will do anything to stop him.