LAPD lieutenant Mike Harrigan ( Danny Glover ) and his cocky detective partner Jerry Lambert ( Bill Paxton ) soon realize that what seemed a bloody feud between voodoo high priest King Willie's ( Calvin Lockhart ) Jamaican gangs and Ramon Vega's ( Corey Rand ) Colombian drug gang is actually the work of a scary third party. Peter Keyes's ( Gary Busey ) federal team shields the crime scene even for the LAPD, but after forensics proves it must be an alien, who keeps making victims, the chase...

A team of special force ops, led by a tough but fair soldier, Major "Dutch" Schaefer, are ordered in to assist CIA man, George Dillon, on a rescue mission for potential survivors of a Helicopter downed over remote South American jungle. Not long after they land, Dutch and his team discover that they have been sent in under false pretenses. This deception turns out to be the least of their worries though, when they find themselves being methodically hunted by something not of this world.