This is “Nanba Prison,” the large impregnable prison somewhere in the territorial waters of Japan. On this night, 4 inmates recklessly attempt to escape from the world’s best prison guards and security. Jyugo, who wears mysterious shackles. Uno, a self-proclaimed ladies’ man. Niko, an otaku who’s prone to illness. Rock, a foodie gang member. Can the inmates of Building 13, Cell 13 pass security and reach outside of prison in one piece?