After a humiliating defeat at the hands of Kendra and Seth, Celebrant, King of Dragons, prepares to unleash his fury and take control of his native preserve. Armed with information from a new ally - Ronodin, the dark unicorn - Celebrant seeks a legendary talisman: the dominion stone. However, the powerful stone is protected by a cursed castle. Can Kendra and Seth foil Celebrant's plan and beat him to his prize?

The dragons have formally declared war on anyone who stands in their way of freedom and unrestrained power. With every dragon sanctuary that falls, Celebrant, the Dragon King, comes closer to his goal of world domination. No single mortal or creature can stop Celebrant. Kendra will need to raise an army of friends and allies to accomplish her mission to thwart Celebrant because her brother Seth and her closest ally, Bracken, are missing.

Since ancient times, the great demon prison Zzyzx has protected the world from the most dangerous servants of darkness, including Gorgrog, the Demon King. After centuries of plotting, the Sphinx is on the verge of recovering the five artifacts necessary to open the legendary prison. Facing the potential of a world-ending calamity, all friends of light must unite in a final effort to thwart the Sphinx's designs and find a safe home for the five artifacts.

Strange things are afoot at Fablehaven. Someone or something has released a plague that transforms beings of light into creatures of darkness. Seth discovers the problem in its infancy, but as the infectious disease spreads, it becomes clear that the preserve cannot hold out for long. In dire need of help, the Sorensons question where to turn. The Sphinx has always given sound advice - but is he a traitor?

Two hidden artifacts have been found. Three more remain unrecovered. More preserves face destruction as the Society of the Evening Star relentlessly pursues new talismans. Reading in Patton's Journal of Secrets, Kendra learns the location of the key to a vault housing one of the artifacts. In order to retrieve it, the Knights of the Dawn must enter a death trap - a dragon sanctuary called Wyrmroost. The mission cannot proceed without stealing a sacred object zealously guarded by the centaurs.