古惑仔雷堅(jiān)虐妻潘婷成性,個(gè)性內(nèi)向的潘在忍無(wú)可忍下跳海自盡,幸得失意人張來(lái)所救.于車房工作的張來(lái),生活潦倒,剛與女友分手,欠下一身債.二人同病相憐,互相勉勵(lì),友誼大增.對(duì)現(xiàn)實(shí)不滿的二人，萌生打劫雷堅(jiān)財(cái)務(wù)公司的念頭。打劫當(dāng)天，雷堅(jiān)剛好轉(zhuǎn)移毒品出貨以避警方耳目,婷欲求財(cái)卻誤劫毒品,決定要協(xié)力堅(jiān)用錢(qián)換回毒品。雷堅(jiān)失貨心急如焚,當(dāng)?shù)弥擎玫乃鶠楹螅淮笈?決定殺......