Purportedly intended as a warning against the dangers of pill-popping Sixties hedonism along the lines of 1936's Reefer Madness, the film's primary purpose appears to have been titillation, thus landing it in the genre of exploitation cinema.

The film is a drama set in Spain where a small group of American young adults is living.

George Montgomery is the psychedelic advisor to a circle of young expatriates living on the Isle of Ibiza.

Visitor Danny Stone, who avoids taking part in the fun until his mother cuts off his allowance, seeks help in a monastery after an LSD-induced crime spree results in the murder of a Barcelona antiques dealer.

The film inspired a 1989 song, "Hallucination Generation" by the new beat band The Gruesome Twosome.