小混混“化骨龙”（张家辉 饰）与母亲（罗兰 饰）相依为命，因一次撞车，化骨龙被老差骨“千年虫”（李修贤 饰）扣下，所幸龙母的装傻技巧助其脱身。四处欠下高利贷的化骨龙母子二人为了躲债不得不时常做戏躲避追债，这日龙母赌马命中，收利的化骨龙却遇上债主被仇家所杀，无意中发现了债主藏钱所在的化骨龙侥幸逃出，又被千年虫作为该命案的重要征人予以全天候的“保护”，只见过凶手屁股的化骨龙思忖脱身后盗走凶案现场的藏金，无奈千年虫的女儿清纯可人，他终不忍离去。另一方面，凶手按照千年虫公布的信息，找到了化骨龙母子，引发龙、虫二人携手对抗凶徒。©豆瓣
故事讲述一位前科犯人（杰克·莱诺饰），被迫要跟被收养的兄弟一起逃亡，全然因为他们被一位报复心极强的罪犯（詹姆斯·弗兰科饰）追捕。而兄弟俩保护自己的方式，就是找到神秘武器。
Ellie, a recovering drug addict, has just moved to a new city with her two teenage children. She has struggled to stay sober in the past and is determined to make it work this time, finding a stable job and regularly attending her meetings. Unfortunately, new friends, a new job, and the chance of a new life, can't keep Ellie from slipping once again. Her life changes when she meets Christopher - a different kind of addict - which forces her daughter and son to accept a new version of Ellie.