This is an experimental Catalan Spanish production. Because of the film's ostensible science-fiction theme, the filmmakers were able to produce a highly political adventure film; the film's political content was not tampered with by Franco's censors. However, the film had an unusually intense focus on sexual activity (for a Spanish film at that time), which was frowned on by the censors, and it was not approved for general release by the time it was shown at the Venice Film Festival in August, 1971. A drug has been discovered, Liberxina 90, which will erase "establishment" conditioning from the human mind. It has fallen into the hands of some diversely anarchistic revolutionaries who spend most of the film discussing how and whether to use it; should they wait for the forces of "history" to undermine society or speed things up using the drug? They are finally forced into action by the police who are, somewhat ineptly, hunting them down.
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