Ensign Bunsen and Lt. Bucket discuss the Captain's strange behavior -- how he promoted Mr. Sock to first officer and setting course for Sock's home planet. Bucket explains that Mr. Sock is a Sok'an, a symbiotic life-form made of natural fibers.
They arrive at planet Sok'Drwr, where Sock must participate in the ancient festival of Pa'ring, in which two Sok'an fight to the death using weapons made from razor-sharp toenail clippings. The winner becomes part of a pair.
Sock is fatally wounded in the battle, but Bunsen is able to darn him together again. However, because the wrong color thread was used, Priestess Ny'lon declares that Sock is unable to be paired.