On the run from the police in Athens, a man named Jason has in his possession a microfilm eagerly sought by both criminal gangs and government agencies.

Sandy and Greg are teenagers who go camping, despite warnings not to, with their friends. They soon encounter aliens, who are using the area as a hunting ground.

A young cavalry officer finds his woman tortured by the Apaches and blames the Army for not properly protecting the outpost, so becomes a deserter and an avenger, stalking and killing Indians without warning.

A scientific team in Mexico discover a pool of unusual baby "octopus-like" specimens. Gathering a few for analysis back at the lab, it is soon discovered that the critters belong to a gangly six-foot half man/half octopus-like creature, that's pretty angry and wants her 'babies' returned…