In the Hong Kong drug dealing scene, drug lord Kang Su Cha, subordinate Zhang Jian Hang, and new member Ou Zhi Yuan are like brothers. So when Kang Su Cha's business starts getting investigated by the police, they flee to the Golden Triangle (where Laos, Thailand, and Myanmar meet) to plan and recover. However, they discover that there is an undercover agent amongst them. Are they a friend or foe?
