Star Trek 2: Wolves Run Amok
A year and a half after the last movie ended (in 2260, in other words), Scotty is put on trial for rape/murder committed while the crew was taking leave on Argellius II, and it is up to Kirk, Sulu, and Chekov to clear his good name. Meanwhile, Spock has begun undergoing Pon Farr, and he, McCoy, and Uhura (whom he intends to undergo the ceremony with) take a shuttle to the New Vulcan colony*. But in a universe where Stonn died with Vulcan, T'Pring survived and has very different intentions toward Spock - resulting in her challenging Uhura to a fight to the death.
Featuring Carol Decker as T'Pau.
*Possibly this colony is in one of the larger deserts on Earth?