在这部最机密第三站科幻/惊悚片中,描述美国政府的细菌战实验室遭遇意外，一些足以令人致命的病毒从实验室的容器中流失，将实验室中几名科学家杀死。其中最厉害的一种病毒称为“撒旦病菌”，它能够杀死任何人，而这种病菌可能被一名疯子偷去了，于是当局想尽办法追踪捉拿这名疯子。
A germ warfare lab has had an accident. The first theory is that one of the nasty germs has gotten free and killed several scientists. The big fear is that a more virulent strain, named The Satan Bug because all life can be killed off by it should it escape, may have been stolen.
