格里高利·派克主演的美国生物学家被当作间谍,潜入红色中国,窃取农业改良生化酶配方。他的上司在其脑中植入微型炸弹,一旦任务失败,就遥控爆炸......An American scientist is sent to Red China to steal the formula for a newly developed agricultural enzyme. What he is not told by his bosses is that a micro-sized bomb has been planted in his brain so that should the mission ever look likely to fail, he can be eliminated at the push of a button!