In the book, Dragonairon: The Gathering, Sara and Marty return to Dragonairon to help with another quest. Goldie, the leader of Draginairon is still not sure who 'The Master' is, and to add to the mystery, there have been sightings of a mysterious large black dragon in the Northern Kingdom. Goldie feels it is time to unite all the dragon kingdoms by holding "The Five and the Round" summit. To do this, she needs to get all the dragon kingdoms to agree to the meeting. Then she can set a date for it. So far, the Fire-on Kingdom, Northern Kingdom and Coral Kingdoms all agree with Goldie. In this adventure, Sara and Marty join with Ted, Plum and Soot to travel to the hot and dry sands of The Digger Kingdom to deliver Goldies letter asking the King of The Digger Kingdom to join them at "The Five and the Round" meeting. Also joining them on this quest is Bud, a dragon from the Northern Kingdom and Aqua from the Coral Kingdom. This time, Sara and Marty only have 10 days in Dragonairon before they must return home... Will they be able to accomplish their quest and return to Goldie to hear what the next step will be?