Julie, Eric, and Neal become stranded when the rainbow staircase that leads from their world to the magical land of Droon disappears, and they must rush to find the five magical wizards who can help them get back home.

The future of Droon lies in the hands of a powerful sorcerer called Sparr.

Princess Keeah, a wizard in training, needs the help of her friends to keep her on the right path when the gift of her first Wizardbook grants her unprecedented power.

Diego is under the spell of the wizard Maldred who wants to control the Naga, an enormous dragon that lives deep within the Earth, and plans to use the boy to steal the two keys necessary for that purpose; the first key is guarded by Argent, the silver dragon, and Jean his dragon master, so Drake, Bo, Carlos, and their dragons travel to Gallia to try and stop the theft and break the spell on Diego.

The Dragon Masters are still reeling from the desertion of Rori and her fire dragon Vulcan, when Mina, a Dragon Master from the far north, arrives with a problem--King Lars needs a fire dragon to defeat the Ice Giant who has frozen his kingdom; and so the Dragon Masters set out to find Rori and convince her to help.