When they find a magic talking sword, Odo, who is instantly made a knight, and his best friend, Eleanor, designated squire, set out on a quest to save their kingdom from threats both human and dragon.

Odo is the seventh son of the village miller and he just wants to get away from work for awhile, Eleanor's mother was a soldier, and she yearns for adventure, but it is Odo who finds the magic talking sword named Biter, and thereby instantly becomes a knight--and together they set out on a quest (somewhat reluctantly on Odo's part) to save their kingdom from threats both human and dragon.

Odo and Eleanor are excited to be knights. Only, nobody's asking them to go on a quest. So they're stuck at home, using their trusty and talkative swords to defend their village when there's cause for defence. But mostly it's just waiting for something bigger to come along. That 'something bigger' comes to them in the form of an old man named Edga, a warrior named Hundred, and an ancient chant: Dragon, dragon, heed our call. Come to aid us, one and all. Odo, Eleanor, and their swords, Biter and Runnel, are plunged into a quest that will take them (as all good quests must) to unfamiliar lands, where they will fight unseen enemies and unlock unbelievable secrets in order to prevent an unbearable impostor from taking the crown. Also, they will need to keep an eye out for dragons.