Triangle is a 2014 South Korean television series.
It airs on MBC on Mondays and Tuesdays at 22:00 for 24 episodes beginning May 5, 2014.
Middle brother Jang Dong-chul grew up as a petty thug on the streets, using his fists and wits to survive until he climbs to the top of a crime syndicate. Now a gang boss, he conceals his real identity and uses the name Heo Young-dal.