35 years after the breaking of humanity's solitude in the universe and the demise of the interstellar invaders has not dwindled the assurance over this spinning piece of solar debris as men have resumed going back to and fro about their little affairs as events were before the eve of the war. Even down to the silly rite of power struggle. One such event takes place on a particular evening as a terrorist group raids U.S. disposal site Fort Jericho. But a Pandora's box is opened as the inert aliens being stored in barrels are reawakened within contact of radiation, which negates the presence of the very bacteria that dropped them and disabled their activity so long ago. Upon freedom, the aliens take over the bodies of the terrorists and then begin to resume the plans that they once drew against us, but doing so now under the stress of their new fallible situation. Meanwhile, astrophysicist Harrison Blackwood (adopted son of Dr. Forrester) and his assistant Norton Drake discover some new alien transmissions that originate right on Earth. With the help of Blackwood's newly hired microbiologist, Suzanne McCullough, they discover that the extraterrestrial killers from 1953 have been freed from their steel drum containers with the very real possibility that they are alive and roaming the planet once again.
In an effort to prove this to General Wilson, Harrison drags Suzanne to the origin of a transmission made out in the middle of the woods. Unbeknownst to them, Colonel Ironhorse and his Delta Squad are there on the trail of terrorists. After the incursion ends in the loss of Ironhorse's men, "Uncle Hank" Wilson decides that there is an alien threat and allows a team to be assembled that consists of Harrison, Norton, Suzanne, and co-signer of the project/combat expert Lt. Colonel Paul Ironhorse so that the danger can be eliminated. The collection is at a just time as the aliens regain their wits in due process of regaining their technological weaponry that they left behind while in hibernation – three remaining war machines stored in a government hanger. The recovery must be interrupted before they active the ships and their unstoppable power once again, picking up where they left off 3-and-half decades ago.moreless