Childhood friendships are put to the ultimate test when a talented emerging fighter faces off against a top underworld boxer in Art of the Devil 2 director Kongkiat Komesiri's action-packed fight flick. As young boys growing up in Chaiya, Surat Thani Province, Piak, Pao, and Samor all trained under Pao's brother Krang (Prawit Kittichanthira, a legendary muay Thai fighter who had in turn been trained by his own father Tew (Samart Payakaroon). When Samor is badly injured, Piak and Pao continue to train under Tew until Tew and Krang are recruited by a high profile Bangkok gym. Unable to resist the call of the capitol and largest city in Thailand, Piak, Pao, and Samor decide to travel to Bangkok as well, bringing a nurse named Sripai along to look after their injured friend. Though Sripai is engaged to Piak, Pao harbors a secret affection for the girl that he doesn't dare mention to his friends. At first it seemed that Piak was set to take the fighting world by storm, but after his quick temper gets him banned from the sport he is forced to enter the brutal world of illegal, bare-knuckle boxing. Later, he and Samor go to work in an underworld go-go bar where Piak enters into a sordid affair with sensual dancer Warn. Before long, Pao has worked his way up through the ranks to become a famous fighter in Bangkok, his upcoming match against feared brawler Diamond Sullivan becoming the hottest ticket in town. But Sullivan is on the underworld payroll, pitting Pao directly at odds with his old pals Piak and Samor. By now Piak's relationship with Sripan has ended, and Sripan has moved in with Pao. When Piak's boss is killed in a deadly play for power, the hot headed brawler takes over as head of the family. Meanwhile, as Diamond pummels Pao in the ring, the brutalized boxer thinks back to happier times in an attempt to summon the strength needed to win the fight.