Cluny moves his camp right outside Redwall, Basil and Constance the badger build a giant crossbow to kill Cluny. Killconey the ferret, however, hears about it, and Cheesethief is used as a decoy.

The Visitor

The dormouse Furlo the Spicer comes to Redwall and kidnaps Cornflower because Cluny has his wife. Matthias, being Redwall's defender, goes to save her with Foremole.

A Favor Returned

A tribe of dormice are killed off by Asmodeus. Cluny starts to 'go off his rocker' as Fangburn says. Matthias goes to get the sword but turns around because Warbeak tells him the rats are making plans. Warbeak and another sparrow go to count the number of rats but Warbeak is captured and put on Asmodeus's trail. Darkclaw, Killconey, and Fangburn think about taking over with Cluny 'out of service'.

Asmodeus

Matthias finally is able to go get the sword from the adder Asmodeus Poisonteeth. With the help of the Guosim shrews he finds Asmodeus's lair. Cluny makes 'any creature big enough to lift sword' join him. Asmodeus is killed by Matthias in the end but he and the shrews are stuck in the underground.

Underground

Matthias and the shrew try to get out of the Earth. Meanwhile Cluny prepares an attack. Killconey tells Cluny and Fangburn about what Matthias is doing. Cornflower and silent Sam the squirrel find the armor of Martin the Warrior.

The Final Conflict

Cluny uses the dormouse, Plumpin, to let him into the Abbey. Matthias and the shrews get back from Mossflower woods. Matthias is away at the time to get the 'Shrewvian Reinforcements' as Log-a-Log says. Once Matthias is back the final battle begins. Cluny is killed in the end, so is the rest of Cluny's rat, stoat (weasels are mentioned but are never seen), and ferret horde.