A public service worker at Oksu Station witnesses a shocking incident and recruits his friend to help uncover the truth behind the station's mysterious happenings.A public service worker at Oksu Station witnesses a shocking incident and recruits his friend to help uncover the truth behind the station's mysterious happenings.A public service worker at Oksu Station witnesses a shocking incident and recruits his friend to help uncover the truth behind the station's mysterious happenings.