The Yellow Knight of Oz, as its title indicates, deals with many a knightly topic, such as heroic quests, in particular the one embarked upon by Sir Hokus of Pokes.
One day in the Emerald City, Sir Hokus made it known he wished to go a-questing. This caused a stir, news traveled quickly, and soon the Knight was chagrined to learn that nearly everyone in the Royal Palace, none quite understanding the solitary nature of a Knight’s quest, wished to go with him as if it were a traveling party. So on the night before the company was intending to set out, Sir Hokus struck out alone.
Deciding eventually that he should seek adventure in the Winkie Country (which, once again, Thompson puts in the east of Oz, as opposed to its accustomed western climes), Sir Hokus strode on recalling the day, five hundred years hence when he knocked a black-armored knight off of his horse. The Black Knight had cursed him to live “in the stupidest Kingdom in Oz,” which was of course Pokes, from whence Dorothy and the Cowardly Lion had rescued him. The rest of his memory before Oz was vague except for that event.
Continuing west—I mean, eastward, Sir Hokus encountered no greater challenge than a particularly rude owl until he met two mud-encrusted men called Getsom and Gotsom. These Mud Guards intended to take him to marry their Queen, Marcia of Marshland, but he fought them off and ran. This was a miscalculation, because he began to sink in the mire, but was rescued by an enormous turtle named Ploppa.
The vast terrapin carried the Knight through the swamp, meaning to get him out of it, but soon the Stick-in-the-Muds (so named because they strode through their mucky home on stilts) were upon them, and Sir Hokus was ushered into Her Majesty’s presence. The horrendous woman, whose only mark of beauty was one wonderful eye (the other one being quite ordinary), ordered the wedding as soon as possible.
At the wedding, Sir Hokus expressed his utter unwillingness to get married, and in the midst of getting walloped by the would-be bride, he was again saved by Ploppa, who had taken a liking to him and carried him well away from Marcia’s marshy dominions. The Knight continued his solitary quest.
Meanwhile (well, you didn’t that that was the only plot of the book, did you?), the Sultan of Samandra, one of the oldest kingdoms in Oz, situated in Winkie Territory, bemoaned the loss of a prized camel. Informed by his Seer, Chinda, that the camel in question was at the Emerald City, he sent his Grand Vizier Tuzzle via Royal Sampan down the Winkie River with gifts for Ozma to exchange for the camel.
However, what he was really after, as he confided to Confido, his dog (Samandran animals, unlike all other Ozite beasts, cannot speak, and thus cannot reveal secrets), was a certain item in its saddlebag.