The official summary is as follows:
When the peaceful life in and around ancient Redwall Abbey is shattered by the arrival of the evil rat Cluny and his villainous hordes, Matthias, a young mouse, determined to find the legendary sword of Martin the Warrior which, he is convinced, will help Redwall's inhabitants destroy their enemy.
- In Redwall.org's Ask Brian, Volume 4, a reader asked if Brian Jacques "ever thought of producing a Redwall comic book or graphic novel?" The response was "No." Approximately five years later, this adaptation was published.