After an alien spacecraft destroys Washington, D.C., the residents of a small town must fight off a unit of alien soldiers on the hunt for the President of the United States and the mysterious device he's carrying after his escape chopper crash lands nearby.

海星状的怪物，五头鲨（头部四个头、尾部一个头）入侵了波多黎各海滩，危及一片和平的天堂岛屿。水生物研究所的几个研究员准备活捉五头鲨，结果损失惨重。没办法的情况下，和警察联手，最后彻底炸死五头鲨。