The story follows the relationship between two brothers (Michael Miu and Eason Chan) who are part of a Hong Kong triad.

The film mostly takes place in Hong Kong and Bangkok, Thailand.

Produced by Andy Lau's Focus Films, Brothers is directed by Derek Chiu and written by Chan Kin-chung and Y.C.

The film was released in mainland China in the name of 兄弟之生死同盟 (pinyin: Xiōngdì zhī Shēngsǐ Tóngméng; lit.

Co starring leads include Andy Lau, Huang Yi, Felix Wong, Kent Tong and Teddy Lin.