It was the summer of the Golden Plains when the cunning and vengeful fox Slagar the Merciless snuck into Redwall Abbey and kidnapped children, among whom was the son of the great warrior Matthias, Matthias. The terrible path of the captives lay in deep caves, in the ominous underground kingdom of Malkarissa. To rescue the captives, the bravest inhabitants of Redwall set out on a deadly campaign. Matthias led them. Behind him came the wise Basil, the Battle Ax Warrior Orlando and many, many others. In the very heart of the underworld they overtook the kidnappers!