The Gods Return is the end of the Crown of the Isles trilogy and the final chapter in the Lord of the Isles. The Fortress of Glass began the tale of how the new kingdom of the Isles is finally created by the heroes and heroines who have been central to the tale: Prince Garric, heir to the throne of the Isles, his consort Liane, his sister Sharina, her herculean sweetheart Cashel, and Cashel's sister Ilna. The Mirror of Worlds followed them on an overland journey to the small kingdoms of the Isles to confirm Garric's succession and subdue, if necessary, any who refused to pledge fealty.

In The Gods Return, the Isles have been more or less unified under Garric's rule, but the Change that created the continent, has removed the old Gods of the Isles from reality and released other Gods from other planes of existence. Now the servants of the forbidden Gods of Palomir call forth The Worm, an ancient thing that threatens to devour all life in the newly formed kingdom and make way for the reign of dark Gods, now awakened to ambitions of worship and dominion. Some are bad . . . and some are worse.