In the tropical jungle of Southeast Asia, Long Fei (Chen Hu) and his partner Pa Yu (Tony Jaa) are participating in a secret mission to cooperate with a commando team for humanitarian rescue. Unexpectedly, they desperately rescued Collins (Scott Adkins), a dreaded criminal leader who has committed many evil deeds. After Collins was rescued, he locked all the insiders in the dungeon of the secret base and blew it up before leaving. Long Fei and Pa Yu escaped at the critical moment of life and death. The two who escaped secretly plotted revenge, but they were not the only ones who wanted revenge. Zaka's (Iko Uwais) wife died innocently in this operation. Zaka saw Long Fei in the underground boxing gym and mistakenly thought he was the murderer. He fought to the death, but he was defeated by Long Fei due to his injuries and was knocked unconscious by Long Fei. Long Fei and Pa Yu kindly took Zaka to their residence to rest. The three of them drank and talked happily. Unexpectedly, Zaka disappeared the next morning, and the fully armed police came to the door. It turned out that Zaka reported that they participated in an underground boxing match. The two were taken to the police station and locked up. Tian Xiaoxian (played by Jingshan Lu), the heiress of a Chinese tycoon, came to Mahazaya to promote the slum renovation plan, but her plan violated the interests of the local gangs and was hunted down. Tian Xiaoxian was forced to flee to the police station. Unexpectedly, the police station was not a safe place. Collins raided the police station with his mercenaries, and Tian Xiaoxian was in danger again. Long Fei, who happened to be detained in the police station, saw through the gang's plan and took Tian Xiaoxian away with Pa Yu. The gang bloodbathed the police station and then framed Long Fei and Pa Yu. In desperation, Long Fei and Pa Yu had to take Tian Xiaoxian on the escape journey. Because of the high bounty of the gang, the three had nowhere to hide, and at this time Zaka also joined Collins' team, and the enemy and friend were unknown. During the adventure, Tian Xiaoxian builds trust with Long Fei and Pa Yu, and Zaka also finds out that the evil forces chasing Long Fei and Pa Yu are secretly controlled by a woman named Su, who is his real enemy. At the decisive moment, Zaka joins Long Fei's camp, and the three of them join forces to fight against the fully armed Collins group...