Afteracollisionwithacomet,anearly8kmwidepieceoftheasteroidOrpheusisheadingtowardsEarth.Ifitwillhititwillcauseaincrediblecatastrophewhichwillprobablyextinguishmankind.TostopthemeteorNASAwantstousetheillegalnuclearweaponsatelliteHerculesbutdiscoverssoonthatitdoesn'thaveenoughfirepower.TheironlychancetosavetheworldistojoinforceswiththeUSSRwhohavealsolaunchedsuchanillegalsatellite.Butwillbothgovernmentsagree