In order to control the number of The Mustangs galloping in the border areas of the United States, every year the US government will arrest a certain number of The Mustangs and send them to various prisons to implement the The Mustang plan. The prisoners will tame the Mustangs and conduct social auctions. Horses that cannot be tamed will be punished with Euthanasia.
Romanis serving in the Northern Nevada State Prison after seriously injuring his wife on impulse. When he made a big mistake because he couldn't control his emotions, Roman always felt ashamed of the person he loved. His autism, remorse, and anger are precisely because he is not a real villain.
Roman and the unruly The Mustang meet in a Northern Nevada prison. They were in similar circumstances, they were all imprisoned, both were angry, and neither could control their anger. The horse was the most violent of The Mustangs to be captured and was kept alone in the shed. After Roman got along with The Mustang, he named the horse Marcus. But in the end, it was not tamed, but Marcus could understand Roman's words, trust him, and be willing to be saddled. It was through the day and night with The Mustang Marcus that Roman, an indifferent person who no longer cared about everything, slowly regained his warmth as a human being
.
