Plot: 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.
Alternative Plot: After astronomer Zane Zaminski (Charlie Sheen) discovers a radio transmission that originated from space, he tells his boss, Phil (Ron Silver), who ignores him. Zane is promptly fired, and decides to investigate the signal himself. When he discovers a return radio transmission from Mexico, he goes to explore. There he meets climate scientist Ilana Green (Lindsay Crouse), who is studying anomalies in gases in the area. Zane soon makes a shocking finding that puts him in great danger.
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