Tarker is a formidable Power Master, who's constant companion is Kok, a cranky black bird with a dubious vocabulary, called a krawk. They are called upon to assist peasants and rulers in times of danger and distress. They find themselves battling demoniacal creatures and other power users, (magos and Zongs), who hire out to anyone willing to pay their price. Tarker, his sons and Offa a desert living hermit, aid Al Dron to suppress an invasion by the tects into the Dorongo domain. Al Dron's son is kidnapped as part of a conspiracy to overthrow Dorongo's ruling family. Trained krawks help to save the boy, before Tarker and Kok again join forces with Lord Dron and his knights, to face an invading army raised by greedy men who want to enslave the population and bend them to their will. Power Mistresses who are great healers and carers of sick animals and the environment, are called upon to purify the domain of Findelling, when all the land and water is deliberately poisoned and the population face starvation, Meanwhile, all the Power Masters find themselves battling against their deadliest foe yet.