In the year 2026 Earth was forever changed by the invasion of the Zeth. Ruthless merciless creatures that will stop at nothing for complete colonization. Unfortunately, humanity has fallen and the human race is on the brink of extinction. After a terrible incident and having once again everything ripped away from him, a 19-year-old boy named Roy decides to stop living scared in a box and take up a gun to reclaim whats rightfully his. Through his hard work and determination to eradicate the Zeth, Roy uncovers a secret that's been hidden away inside humans for the past 10 years. With this newfound knowledge, humanity once again has a chance to reclaim their home. All they have to do is leave in it in the hands of the "Links"