Kirk and McCoy find themselves stranded on a planet where the Klingons are giving some natives help.
Tribbles eat, reproduce, and cause all kinds of trouble.
Mining negotiations on a less technologically advanced planet take a bad turn when the Klingons and a pregnant widow make things worse.
Captain Kirk finds himself trying to protect a planet from Klingons when the residents don’t seem really inclined to do anything about it themselves.
Captain Kirk faces off against a Gorn captain for the fate of both their ships.