When the headmaster of the Dragon Slayers' Academy hears that Princess Belcheena will pay the matchmaker who finds her a husband, he decides that Wiglaf is the perfect candidate.

After a summer at Camp Dragononka, Wiglaf returns to school to find himself tormented by his energetic younger brother Dudwin and a troublesome troll with a sense of humor.

Even though summer vacation starts in five days, Pearl and Wagner, a rabbit and a mouse who are best friends, worry about next year's teacher, mean Ms. Bean.

Each morning, student Ron Faster hurries to Harvey N. Trouble School, where he encounters such staff members as science teacher Ms. Roxanne Pebbles, music instructor Mrs. Doremi Fasollatido, and the resigning janitor Mr. Iquit.

Fluffy the guinea pig enjoys himself when Ms. Day's class has a party to celebrate the one hundredth day of school.

Wiglaf joins the other students of Dragon Slayers' Academy in searching the Dark Forest for the Cave of Doom, which supposedly contains the gold of the dead dragon Seetha.

April Fools' Day is not a happy one for Wagner the mouse because his best friend, Pearl the rabbit, and other children and adults at school keep tricking him.

In this book Meg brings her prairie diary to an end describing her days in the Kansas Territory, a deadly twister, and the start of school.