Star trek The Next Generation The Dominion War

From the Gamma Quadrant came hordes of merciless Jem'Hadar soldiers commanded by the shape-changing Founders, who seek to conquer both the United Federation of Planets and the Klingon™ Empire. Now that the Dominion has joined forces with the Cardassians and claimed Deep Space Nine™ as their prize, Starfleet is running out of time. As a secret military project nears completion, the entire Alpha Quadrant's destiny depends on a few's courage.
In the Federation's time of greatest peril, as the Starship Enterprise™ readies itself for battle, Captain Jean-Luc Picard leads a desperate espionage mission deep into the heart of the hostile Cardassian Empire. Unless they can prevent the Dominion from creating an artificial wormhole, hordes of fresh Jem'Hadar warriors and Changelings will pour into the Alpha Quadrant, dooming the Federation to unconditional surrender. However, there may be a traitor on the mission, and Picard finds he cannot trust even his closest allies.

Condition Semi-Excellent