At the end of the 4th episode, the leading male character, Park Yoon Kang (played by Lee Joon Ki) came back to Korea after staying in Japan for 3 years, wearing western clothes and holding a handgun. He hides his identity as Yoon Kang and pretends to be a Japanese, Hasegawa Hanjo.
Now that the introductory chapter on different characters and background stories is finished, the real story of the Joseon Gunman is starting from next week.
