While exploring the Delta Triangle, where many starships have disappeared,
the Enterprise is attacked by several Klingon vessels. During the fight, the
Enterprise and a Klingon ship slip into a space-timewarp starship
graveyard. The crew discovers that the timewarp is disintegrating the Enterprise's
dilithium crystals, and that they must link their ship with the Klingons to leave the trap,
or they will be powerless and trapped forever.
In this episode, Kor commands the battlecruiser Klothos. A fact referred to in the DS9 episode
"Once More Unto The Breach".