在这部天狱飞龙 2动作/科幻片中,在《天狱飞龙》第一集里，约翰（克里斯多夫蓝伯特）与妻儿好不容易逃出了守备森严的「堡垒」，在经过七年的逃亡后，最后还是落入了控制监狱的超级企业之手，但这次他被关进一家设备更先进、监视更严密的太空监狱。 这座尖端科技的监狱在距离地球二万六千哩高空的轨道运行，里面关的都是地球上最凶恶的罪犯，为了阻止犯人脱逃，甚至在他们体内装上了监视器... 然而约翰不是个会轻易放弃的人，为了和在地球上等待的儿子团聚，约翰决定再次完成不可能的任务，逃出这座号称固若金汤的太空监狱，给邪恶的超级企业一次迎头痛击！然而孤立无援的他该如何重返地球呢...
7 years after the original Fortress movie, Brennick and his family are still on the run from the Men-tel corporation. A group of rebels attempt to gain his support but he refuses, wanting to focus on his family. A raid follows and Brennick along with the rebels are captured and sent to a new, more sophisticated fortress prison in outer space. But Brennick's not a man to give in easily, and with a 10 year old son waiting for him back on earth, he's going to pack some serious assault on the evil corporation...
