Star Trek VI: The Undiscovered Country

Star Trek VI The Undiscovered Country is a 1991 American science fiction film. It is the sixth feature film based on Star Trek, a sequel to 1989s Star Trek V The Final Frontier and the last film featuring the entire cast of the original series. After the destruction of the moon Praxis leads the Klingon Empire to pursue peace with their longtime adversary the Federation, the crew of the USS Enterprise must race against unseen conspirators with a militaristic agenda.

As a Klingon moon, Praxis, explodes without warning, the starship USS Excelsior, commanded by Captain Hikaru Sulu, is struck by the shock wave and its crew discovers that much of the moon has been obliterated. The loss of their key energy production facility and the destruction of the Klingon homeworlds ozone layer throws the Klingon Empire into turmoil. No longer able to maintain a hostile footing, the Klingons sue for peace with their longstanding enemy, the United Federation of Planets. Accepting the proposal before the Klingons revert to a more belligerent approach, Starfleet sends the USS EnterpriseA to meet with the Klingon Chancellor, Gorkon, and escort him to negotiations on Earth. Enterprise s captain, James T. Kirk, whose son David was murdered by Klingons years earlier, opposes the negotiations and resents his assignment.After a rendezvous between Enterprise and Gorkons battlecruiser they continue towards Earth, with the crews sharing a tense meal aboard Enterprise. Later that night, Enterprise appears to fire on the Klingon ship with a pair of photon torpedoes, disabling the artificial gravity aboard the Klingon vessel. During the confusion, two figures wearing Starfleet suits and gravity boots beam aboard the Klingon ship and grievously wound Gorkon before beaming away. Kirk surrenders to avoid a fight, and beams aboard the Klingon ship with Doctor Leonard McCoy to attempt to save Gorkons life. The chancellor dies, and Gorkons chief of staff, General Chang, puts Kirk and McCoy on trial for his assassination. The pair are found guilty and sentenced to life imprisonment on the frozen asteroid Rura Penthe. Gorkons daughter, Azetbur, becomes the new chancellor, and continues diplomatic negotiations for reasons of security, the conference is relocated and the new location is kept secret. While several senior Starfleet officers want to rescue Kirk and McCoy, the Federation president refuses to risk fullscale war. Azetbur likewise refuses to invade Federation

Source: Wikipedia