The Year of 2020. Everything is changed. Every known people are old. But except for Wu Zi Mu and Mike Toreno. They're traveled from 1993 to 2020. They created an organization called S.A.S.A.R.F. They want to keep the future from mistakes, that everyone did. But they can't do it alone. They need someone to help them. They need... best shooters and best fighters in the past to help in the future...