Sun refuses to allow drugs into his territory, which results in a poor meeting with a drug cartel. The cartel gives Sun and his gang three days to make a decision, which leads to conflict within the gang. Despite Peach not being directly involved, sees Sun worrying and becomes more determined to stand by Sun.

Sun rescues Mei, but she has to recover from her injuries including drug rehabilitation. He learns that his old rivals planned the kidnapping, and rallies his brothers-in-arms to fight back. At the same time, a fortune falls into Sun's hands and embroils him in an even bigger scandal.

Sun tries to get in touch with his old friends to bring the Bangkok Boys back together. Despite going their separate ways, their tendencies towards fighting bring back their feelings of friendship. At the same time, Sun accidentally saves Peach, an artist, and their encounter on the roof brings a brief moment of peace to his troubled life. The disappearance of his sister Mei is finally revealed, but an unseen war is also taking shape.

Sun reunites with his old friend Tan and is determined to find out the truth behind his father's death. He takes over his father's warehouse and starts a fightclub, building up his reputation as the "Bangkok Boys" grow in influence.

Sun deals with painful memories, getting arrested during a confrontation, the injury of his partner and death of his father. Having his life shatter while being questioned by his family, his path becomes clear.

Sun's life is upended after a violent dispute with a rival gang.