Lt. Col. Glenn Manning is inadvertently exposed to a plutonium bomb blast and although he sustains burns over 90% of his body, he survives. Then he begins to grow, but as he grows he starts losing his mind. By the time he stops he is 50 ft tall, insane and is on the rampage.

卡洛·隆巴迪博士声称，通过催眠，他可以让他的病人恢复前世的记忆，从而证明轮回的存在。他还声称这些前世的灵魂可以被带出体外，获得肉体形式。一个似乎消失在海里的生物所实施的一系列暴力谋杀表明，隆巴迪的说法可能是正确的。医学界和科学界认为他是一个彻头彻尾的骗子，但一位商人却看到了利用隆巴迪的能力发大财的机会。