Plot summary
En route towards the Alpha Quadrant, the Federation starship Voyager is forced to travel through a sector of space, "The Void", where starlight is shrouded, creating a dense black cloud. The journey through this sector will take two years, but only two months into the travel has set the crew on edge. Left with nothing to do in the empty darkness, Captain Janeway has taken the time to reflect on their situation, feeling intense guilt for her choices that left the crew stranded in the Delta Quadrant.
One day, all power to the ship is knocked out, caused by an external field. They discover several alien intruders aboard Voyager and are able to capture one, dubbing it a Night Alien. They manage to restore power, discovering themselves surrounded by three smaller ships, but soon these are chased away by a larger ship of different design. Its pilot introduces himself to the Voyager crew as Emck, a Malon. After learning of Voyager ' s plight, he offers to lead the ship to a vortex that can lead them to the other side of The Void, in exchange for the Night Alien. Janeway refuses until she learns more.
The Night Alien in Sickbay is dying of theta radiation but after learning that Voyager has no hostile intentions, apologizes for his species' actions. They are a people that are trying to fight the Malon, as the Malon dump toxic theta radiation into The Void, harming their species. The Night Alien is transported off Voyager by its fellow people before it dies. Janeway then tells Emck that she knows what's really going on and attempts to arrange a deal with him, to provide him with Federation technology to recycle the theta radiation into useful energy and matter in exchange for passage to the vortex, but Emck refuses, as this technology would ruin his livelihood as a waste hauler.
Janeway learned of the vortex's location from the Night Alien and she attempts to order the crew to send Voyager through the vortex while she stays behind in a shuttle craft to destroy it, ending the Malon's use of The Void as a dumping ground. The crew refuses, acknowledging that they do not blame Janeway or harbor resentment for her actions that stranded them in the Delta Quadrant. They come up with a second plan, to launch torpedoes shortly after entering the vortex, riding out the shock wave as the vortex is destroyed.
As Voyager approaches the vortex, they are attacked by the Malon, but soon the smaller Night Alien ships reappear and attack the Malon long enough for Voyager to destroy Emck's vessel before entering and destroying the vortex. The journey leaves them but a short distance from the edge of The Void and within minutes, the Voyager crew is elated to see stars once again.
Credits
Adapted from Wikipedia contributors, Night (Star Trek: Voyager). Paragraphs and formatting adjusted; illustrations, reference markers, block quotations and non-story material omitted.