The Earth is threatened by an alien race who kidnap and kill humans and even animals and use them for their body parts. In the year 1980 S.H.A.D.O. (Supreme Headquarters Alien Defence Organization), a highly secret military organization, is set up in the hope of defending the Earth from this alien threat. This organization operates from a secret location beneath the Harlington-Straker film studio in London. S.H.A.D.O. also has a base on the moon with Interceptors as well as an early warning satellite that detects inbound UFOs (called S.I.D.), and operate a fleet of submarines. General James Henderson and commander Ed Straker have a team of highly trained and well equipped females and males to battle the regularly incoming hostile UFOs.

当彼得·卡特发现他9岁的女儿成为镇上最有权势家庭的恋童癖家长的受害者时，他遭到了官方的抵制。 镇上新任命的校长彼得·卡特和他的妻子萨莉的九岁女儿让·卡特和她11岁的朋友露西尔在树林里玩耍，这时琼发现她丢失了装着“糖果”钱的钱包。露西尔告诉她，她知道哪里可以免费得到糖果，并把她带到一座气势恢宏的豪宅里，屋主老克拉伦斯·奥尔德贝里是一位70岁的瘦高个子男人，他一直从窗户望着姑娘们。那天晚上，琼睡不着，她告诉父母，奥德伯里让她和露西尔在他面前裸体跳舞，换取一些糖果。卡特提出了申诉，但当地警察局长哈蒙德上尉对琼的说法表示怀疑，并警告卡特，奥尔登贝里家族将小镇列入地图，在社区中的地位远远超过了新来的卡特尔家族。小奥尔登贝里还告诉卡特...