This movie was made motivated by the real experience of the director Kwak Kyung-taek and the real event. 'Sang-taek'(Seo Tae-hwa) is a character that reflects the director Kwak Kyung-taek. This movie is motivated by a real murder case that happened in Busan in 1993. 'June-seok' (Yu Oh-seong) is similar to the real friend of the director Kwak Kyung-taek, a member of a gang. 'Dong-su' (Jang Dong-gun) is similar to the boss of another gang, who is real friend of the director Kwak Kyung-taek.