ZAIA Enterprises CEO Leon Arkland has kidnapped Jin. Horobi, Ikazuchi, and Naki attempt to rescue him, but in their path they come across Soldier-Model Humagears called Solds. Leon's aim is to mass produce these Humagears who possesses no will of their own and sell them as weapons to the world. Horobi stands opposed to such a plan and seeks to free the Solds. But soon, something begins to happen to Jin, just as planned by Leon, a new threat against humanity will be born.