Old Boy, Volume 2 (Old Boy #10-19)

Deciding that he must know the truth, the man who calls himself "Yamashita" follows a trail of clues that lead him back to the mysterious building where he was imprisoned and kept incommunicado for ten years. There, with the help of violence and a brutal imagination, he will try to find answers to the questions that haunt him. However, he will discover that his opponent will not yield to him so easily, and that his ordeal is far from finished.