On July 2, a giant alien mothership enters orbit around Earth and deploys several dozen saucer-shaped 'destroyer' spacecraft that quickly lay waste to major cities around the planet. On July 3, the United States conducts a coordinated counterattack that fails. On July 4, a plan is devised to gain access to the interior of the alien mothership in space, in order to plant a nuclear missile.

The investigation of two horrific mass murders leads to the capture and trial of the psychotic pseudo-hippie Charles Manson and his "family".

Centered around a vehement diatribe against pornography delivered by news reporter George Putnam, the film attempts to link explicit portrayals of human sexuality to the subversion and decline of American civilization, and briefly draws a parallel between pornography and Communist infiltration. Perversion for Profit illustrates its claims with still images taken from various softcore pornography magazines of the period-- though, 'sensitive' parts of the human anatomy have been obscured by colored bars. The film is in the public domain, and has become a popular download from the Prelinger Archives.

Young Brad Craig enters the military school with a chip on his shoulder which upperclassmen quickly knock off. Once adjusted, Craig falls in love with a professor's beautiful daughter, only to find she is in love with his roommate.