You are the warrior Lone Wolf—Kai Grand Master of Sommerlund. You have defeated the Darklords of Helgedad and avenged your murdered ancestors, but now you are challenged by a sinister evil which threatens to destroy all life on your home world of Magnamund. In The Plague Lords of Ruel your mission is to prevent the malevolent Cener Druids of Ruel from releasing a deadly plague virus that will destroy all but their own kind. Of all the warriors of Magnamund only you can thwart their wicked plans—for only you possess the disciplines of a Kai Grand Master.