Tik-Tok of Oz is the eighth Oz book. The story begins in a faraway corner of Oz, in the small country of Oogaboo. There, Queen Ann Soforth musters an unlikely army and sets off to conquer the rest of Oz.

Meanwhile, a girl from Oklahoma named Betsy Bobbin and her companion, Hank the mule, are shipwrecked and washed ashore in the Rose Kingdom, a magical land of talking roses. There they meet the Shaggy Man, who is on a quest to rescue his brother from the clutches of the evil Nome King. Betsy, Hank, and the Rose Princess join the Shaggy Man on his journey, and before long they meet up with Polychrome, the Rainbow's Daughter; Tik-Tok; and Queen Ann with her army.