The Redwallers face some of their most dangerous villains yet in a treacherous hunt for long-lost treasure.

While a group of adventurers from Redwall seeks out the ancient abbey of Loamhedge in hopes of curing a young haremaid's paralysis, Redwall is besieged by vermin.

Triss, Shogg, and Welfo escape from slavery at Riftgard and are pursued across the sea toward Redwall by Princess Kurdah, Prince Bladd, and a band of freebooters who seek the rumored treasure of Brockhall.

The murderous and evil Razzid Wearat and his crew of vermin are on a mission to seize Redwall Abbey for themselves, and Abbot Thibb and his Redwallers must defend their home with the help of the hares of the Longpatrol and the Rogue Crew of sea otters.

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.