Star Trek: Challenger is a machinima. It is a fan-made, non-profit production.
Five years after the Dominion War, the Federation is finally returning its focus to exploration and discovery. With peace negotiations with the Romulan and Klingon Empires reaching an unprecedented level of success, the Alpha Quadrant now enjoys a new era of peace, however, something has been waiting… watching… for the right time to strike.
That time is now.
Challenger takes place aboard a Galaxy-class starship in 2380, in a region called the Kaillera Expanse. The Federation, the Romulans, and the Klingons are cooperatively building a starbase to facilitate trade and resource mining in the region, when the construction efforts are offset by a terrorist attack.
Suspicions run high, and the already-tentative alliance is threatened with collapse.
It's up to the Challenger and her crew to explore the region, while keeping the peace in check.