Star Trek Voyager - The Nanotech War

Captain Janeway and the crew of the USS Voyager encounter the Chiar, an advanced civilization deeply integrated with nanotechnology. When a bitter civil conflict among the Chiar leads some to attempt harnessing the deadly power of the Borg, their experiment spirals devastatingly out of control. The Voyager crew must navigate this new threat, which combines advanced technology with the destructive force of the Borg, to prevent widespread catastrophe.