Title: Rainmaker.
Era: Post / During Voyager's last few years on screen, or just at the moment of the finale.
Setting: Starship.
Kes returned to her planet, and found that the Ocampa city was running out of time: the energy that the Caretaker stored there is running low, the security shields are failing, and the Kazon are swarming around like little sharks waiting to strike the raw underbelly of so soft and gentle a species.
Her solution? Bring friends to help. By studying the Ocompan city's technology (and files that appeared in the Ocompan computers post-Caretaker's death), Kes has learned a way to use her temporal/spacial abilities - and most of the reserves of the Ocompan planet, to create a kind of wormhole slingshot effect like the one she used while evolving. She reaches out with her mind, and reaches for the Starship Voyager, which has just entered orbit of Earth with a convoy of ships sent to stop the Borg, and then... slips and grabs the wrong ship.
So, the player crew and their ship end up in the Delta Quadrant, in orbit of Ocompa, sensing that whatever spacial anomoly snagged them here, it's currently "rubber banding" backwards, and will create and equal and opposte effect in the other direction in, oh, say, 3 days.
They are hailed from the surface, people calling for Voyager. Oops. Crew then has to help the poor Ocompa - including a semi-lucid, exhausted Kes - in restoring their world in a very significant way: bringing back rain. The reintroduction of whatever it was that the Caretaker accidentally wiped from the planet will be tough enough, let alone with the resources of one ship, Kazon aggression, and a 3-day time limit...
The Doc
So you think, 'Might as well,
Dance a Tango to Hell,
at least I'll have Tangoed at all.'
-- "Rent," Jonathan Larson