Drug lord Kang Su-cha (played by Lau Ching-wan) has been engaged in drug trafficking with his subordinate Zhang Jianxing (played by Aaron Kwok). The newly joined member Ou Zhiyuan (played by Louis Koo) also had a life-and-death friendship with the two due to an accident. The three of them are like brothers. After Kang Su-cha's drug trafficking business in Hong Kong was investigated by the police, he led his team to flee to the Golden Triangle for development, but unexpectedly discovered that there was an undercover agent around him. At this moment, it is unclear whether it is an enemy or a friend.