Afteracollisionwithacomet,anearly8kmwidepieceoftheasteroid"Orpheus"isheadingtowardsEarth.Ifitwillhititwillcauseaincrediblecatastrophewhichwillprobablyextinguishmankind.TostopthemeteorNASAwantstousetheillegalnuclearweaponsatellite"Hercules"butdiscoverssoonthatitdoesn'thaveenoughfirepower.TheironlychancetosavetheworldistojoinforceswiththeUSSRwhohavealsolaunchedsuchanillegalsatellite.Butwillbothgovernmentsagree?