Since taking the Korean film scene by storm with his ultra-low budget debut feature, DIE BAD, RYOO has been making noteworthy films in the action and thriller genre such as NO BLOOD NO TEARS, ARAHAN, CRYING FIST, CITY OF VIOLENCE and THE UNJUST. Nicknamed ‘Chungmuro’s Action Kid,’ RYOO’s pulpy crime thrillers can be characterized by his hard-edged, innovative style with an emphasis on lavishing action sequences. His film, THE UNJUST, a crime drama that took a sharp observation into corruption in privileged classes of the modern Korean society was met with both critical and commercial success garnering 2.8 million admissions. RYOO returned to the director's chairs after three years with a story of four operatives from divided Korea leading clandestine and dangerous lives under covert identities in modern day Berlin. Taking the international metropolis as its backdrop, RYOO's latest work featured a thrill-packed chase between the North and South Korean operatives on an unprecedented scale and captured the essence of his unique style. RYOO next took part in the 3D horror omnibus <Mad Sad Bad>, which opened the Jeonju International Film Festival in 2014.