在这部师爸喜剧/动作片中,杰仔生性好动，一时意气用事与黑帮青年斗车，将黑帮青年之电单车撞毁，黑帮青年纠党往车行报复，将车房汽车毁坏，杰仔为讨回公道，往黑帮开设之地下赌场，利用契爷传授之千术，对付黑帮老大郭善，善表面是正当商人，暗地里经营着黄、赌、毒生意，无恶不作。因为杰仔在赌场捣乱，善派人将车房尽毁，杰请出契爷帮忙，契爷伙同拍档朱金斗，将千门中计中计、反间计等计谋使出，让善输地一败涂地……
Git is a young mechanic working for his uncle in a small garage. Git's cousin is tricked out of a large amount of money by a card sharp, and Git promises revenge.
