Wiglaf faces the double embarrassment of having his wacky parents visit Dragon Slayers' Academy on Parents Day and starring in the school play as the brave but small knight, Sir Tinybottom.

While Headmaster Mordred is trying to impress a new student, who he believes to be the first female at Dragon Slayers' Academy, the ghost of one of the school's founders besieges the halls seeking his stolen gold.

Wiglaf and his classmates come to appreciate their elders when they learn that only a group of retired knights can save their school from the world's oldest living dragon, Grizzlegore--if they can get back in shape in time.

Wiglaf and his friends are on a mission to rescue Worm, the dragon they have raised from an egg, and are surprised to learn that the captor is not a gang of dragon slayers, but rather a young giantess who wants to keep Worm as her house pet.

Wiglaf and his pig, Daisy, are spending a DSA holiday with Erica at the Royal Palace, but King Ken has come down with the pox and Queen Barb's great healer is a not-so-great wizard who leaves King Ken speaking Pig Latin.