The blacklisted American documentarian Willard Van Dyke filmed this tale about tobacco workers in the heart of the Puerto Rican countryside. Heeding their wives’ advice, individuals join forces in a cooperative so they can sell their crop of tobacco leaves at fair market value.
While her new husband is away looking for work, the wife loses the child she was expecting and uses another woman's baby as a substitute so she won't have to upset her spouse when he returns.
Murders, with victims dying from spines broken by brute strength, erupt in the city and the killers, when encountered, walk away unharmed by police bullets which strike them.
A woman impressed by news reports about flying saucers, gets hit on the head by a vase, passes out and dreams that she is the 'Queen of Mars', from where she sends an expedition to Earth in order to bring back Rio's Carnaval to the planet.