Je-hyuk was the hero of the ground who was always reliable for his fans and his teammates. Many teams are betting sky-high numbers to get Korea's best closer. Right before he sets foot in the major league, he is sentenced to prison after being accused of imperfect self-defense while trying to protect his younger sister. Now, he has to share a tiny cell with a dozen other people. He has to use the toilet in plain sight. They don't use names when they call each other. Age, position, and freedom have no meaning here. The guards are no different. They must watch the inmates 24 hours a day as they sleep, eat, and do their business. The prison where they need to re-learn how to dress, eat, and sleep inside 20-foot walls also needs a hero.