When the peaceful life of ancient Redwall Abbey is shattered by the arrival of the evil rat Cluny and his villainous hordes, Matthias, a young mouse, determines to find the legendary sword of Martin the Warrior which, he is convinced, will help Redwall's inhabitants destroy the enemy.

Urthstripe the Strong, a wise old badger, leads the animals of the great fortress of Salamandastron and Redwall Abbey against the weasel Ferahgo the Assassin and his corps of vermin.

When the rat pirate Gabool the Wild attacks the mouse-ship carrying Joseph the Bellmaker, he plunders its magnificent bell in a fit of greed, and then pitilessly casts Joseph and his daughter Mariel into the raging sea. After she is rescued and brought to Redwall Abbey, Mariel sets out with three fearless Mossflower companions (and her trusty rope-weapon, the Gullwhacker) to track down Gabool and avenge her father-and thus begins an unforgettable...