邪恶的科学家Dr（罗伯特-杜瓦尔饰）妄想统治世界，他违背伦理道德克隆了复制人，利用他们来杀害不听自己命令的人。Dr克隆出来第一个实验品就是亚当-吉布森（阿诺-施瓦辛格饰）。当真正的亚当回到家中时，发现他的家已经被一个和他一模一样的克隆人所霸占，他的家人只认这个克隆人。正当他要解释清楚时，一伙不明人士绑架了他，他莫名其妙地被这些人带到一个邪恶的世界。为了重新做回自己，亚当必须要在最短的时间内查出背后的阴谋。亚当的好友汉克（迈克尔-拉帕波特饰）是唯一一个认出他真实身份的人，为了帮助亚当找回身份，夺回原本属于他的幸福家庭，他全力以赴，和亚当并肩作战，两人和邪恶势力对抗，其间遇到了不少艰难险阻，但是两人毫不退缩，最终凭着大无畏的精神战胜了敌人

The evil scientist Dr (played by Robert Duvall) wants to rule the world. He cloned replicants in violation of ethics and morals, and used them to kill those who did not listen to himself. The man who ordered. The first experimental product cloned by Dr is Adam Gibson (Arnold Schwarzenegger). When the real Adam returned home, he found that his home had been taken over by a clone who was exactly like him, and his family only recognized this clone. Just when he was about to explain clearly, a group of unknown people kidnapped him, and he was inexplicably taken by these people to an evil world. In order to be himself again, Adam must find out the conspiracy behind it in the shortest time. Adam's friend Hank (Michael Rapaport) is the only one who recognizes his true identity. In order to help Adam recover his identity and take back the happy family that belonged to him, he goes all out to fight side by side with Adam, The two confronted the evil forces, and encountered many difficulties and obstacles during the process, but the two did not flinch, and finally defeated the enemy with a fearless spirit