The Enterprise is investigating a "Bermuda Triangle of Space" when pursuit by three Klingon ships forces them into the area. They and the lead ship commanded by Captain Kor disappear and reappear in a mysterious null area of space filled with abandoned ships. They find a concentrated population on one ship and both captains are whisked away to meet with a Council of various aliens who are trapped there. Unable to escape because of the eventual drain of all higher power systems, they have formed a peaceful coalition, the Elysians, and insist the newcomers obey their rules. The Klingons fail in one attempt to escape the area, but Spock determines that the two ships together might succeed if they operate in tandem. Reluctantly Kor agrees but prepares to sabotage efforts. He has his mate plant a bomb during a social party between the two crews. The two ships linked together manage to escape but Scotty and Spock find the bomb and jettison it just before the Klingon ship breaks away and activates it. The detonation makes it look like the Enterprise has been destroyed, allowing them to escape the Klingons without further incident.