When the astronomer Zane Zaminski receives signal from a distant star, he reports and gives all the evidences to his chief, Phil Gordian, and is immediately fired. Zane becomes obsessed to locate the signals again and finds a transmission to the outer space in the same wave from Mexico, and he flies to the place. Meanwhile, the scientist Ilana Green is investigating the unexplained raise of the temperature in Third World countries and also goes to Mexico for further research.—Claudio Carvalho, Rio de Janeiro, Brazil