A The plot of his novel was full of ups and downs, and the cadence was not appropriate. Ups and downs: It described the twists and turns of the story, the beginning, the ending, and the rhythm. The cadence of music, the cadence of intonation, there are cadence, high and low, twists and turns. This idiom is used to describe the plot of the novel, but the word used to describe the plot of the novel is "ups and downs".