A cold-blooded, ruthlessly efficient covert operative known as Geist. Having walked the shadowy corridors of the state, he was thought to have died during a classified mission when the enemy’s trap claimed his life... or so it seemed. He wakes up in the body of a high-schooler, Keisuke Sakuraba, who’s in the middle of a fight. It turns out the kid is caught up in a mysterious battle circuit where fights are livestreamed and money is won or lost based on the outcome. Borrowing the frail body of the student, Geist vows revenge on an old nemesis. The weakest body houses the strongest mind and skill, a revenge battle action featuring a special operative!