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 Diego 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.

When the king decides to take the dragons to Arkwood to visit Queen Rose, Rori, Drake, and their dragons are left behind--so when the evil wizard Maldred attacks the castle riding a giant four-headed dragon that spits poison, the two young dragon masters and their dragons are forced to defend the castle by themselves.

The evil wizard Maldred has stolen the gold and silver keys which will allow him to release the Naga, the powerful earthquake dragon at the center of the earth--so Drake and several of the other Dragon Masters travel to the Naga's Temple in the Dragon Islands, to try and stop Maldred, and prevent him and the earthquake dragon from destroying the kingdom.

Drake has a dream about a new dragon that is somehow trapped in a cave, so Drake, Ana and their two dragons set off to find the Rainbow Dragon's dragon master, Obi, and together they must rescue Rainbow dragon, Dayo, from Kwaku, a giant spider, who spins a deadly web.

Lalo the baby lightning dragon has been taken by Eko, a rogue Dragon Master, who ran away with her thunder dragon years before--now she is back looking to make allies of the other dragon masters, and so gain control over all of the dragons in Griffith.

The Dragon Masters have two tasks: track down the newly hatched Lightning Dragon, and find his destined Dragon Master, a boy named Carlos, and convince him to trust them--but somebody else has dark plans for this particular powerful and wild dragon.

"The dark wizard Maldred has trapped dragon master Eko as well as wizards who have opposed him, all of them frozen in time and space inside a wall in his hideout; so Drake and Worm set out to seek the help of the Time Dragon--but when a imp named Beezel interferes Drake ends up back in his own past, and he must find a way to get back to the present." --

The Dragon Masters have defeated the evil wizard Maldred, but not before the Kingdom of Bracken was devastated by Naga, the earthquake dragon; now Drake and his dragon, Worm, must appeal to the spring dragon, Fallyn, who is their only hope of restoring Bracken before its people starve--but Fallyn lives deep inside a secret fairy world, and Drake must pass a series of tricky tests before he can even make his appeal.

This series is part of Scholastic's early chapter book line called Branches, which is aimed at newly independent readers. With easy-to-read text, high-interest content, fast-paced plots, and illustrations on every page, these books will boost reading confidence and stamina. Branches books help readers grow! In this third book in the series, someone is trying to steal the Dragon Stone. Drake soon discovers that the thief is his friend and fellow Dragon...