When Masterharper Zist takes over as Harper for Natalon's coal-mining camp, he takes with him his apprentice, the orphaned, mute Pellar, and Pellar's fire-lizard Chitter. Pellar has become a gifted tracker and Zist gives him his own mission - to find out if the recent thefts of coal are the work of the Shunned, criminals condemned to a life of wandering and hardship. Halla is one of the children of the Shunned. Though innocent of their parents' crimes, these children have inherited their cruel punishment. With no shelter when the lethal Thread falls again they will have no protection against it. Life is even tougher for Halla, all her family are dead and she must fend for herself. Yet Halla is kind and gentle, devoted to helping those more helpless than she, unlike Tenim, a fellow child of the Shunned. Tenim is in league with Tarik, a crooked miner from Camp Natalon, who helps him steal coal in exchange for a cut of the profit. But Tenim soon realizes there is a lot more to be made from firestone, the volatile mineral that enables the dragons of Pern to burn Thread out of the sky. Tenim doesn't care what he has to do, or whom he has to kill, in order to corner the market. Cristov is Tarik's son. Dishonored by his father's greed and treachery, he decides he must make amends somehow... even if it means risking his life by mining the volatile firestone, which blows up at contact with the slightest drop of moisture. When the last remaining firestone mine explodes in flames, a desperate race begins to find a new deposit of the deadly but essential mineral, for without it there can be no defence against Thread. But Tenim has a murderous plan to turn the tragedy to his own advantage, and only Pellar, Halla and Cristov can stop him - and ensure that there will be a future for all on the world of the Dragonriders.

Shortly after Fiona's return to Fort Weyr, three Turns older and wiser, her queen, Talenth, is infected with the dreaded sickness that has consumed so many of Pern's precious fire-breathing dragons. Talenth's recovery and the recovery of all the other dragons of Pern is delivered by the unflagging efforts of Lorana and Kindan at Benden Weyr - but their one vital clue is only bought with the loss of all the dragons of Telgar Weyr. Fiona is sent to relieve the distressed weyrfolk of the now-dragonless Weyr. When her queen, Talenth, rises to mate, Fiona finds herself not only Telgar's senior Weyrwoman but in the center of the dilemma that confronts all Pern - how can the one thousand fighting dragons do the job of three thousand? And, if they can't, how long will it be before all of Pern is consumed by Thread?

Although Lorana cured the dragons' sickness so many died from the disease that there are no longer enough dragons to fight the deadly Thread, and more dragons and their riders die each Threadfall. With their numbers dwindling, Lorana made the decision to fly forward in time in a desperate bid to bring dragons from the future to fight Thread. She knew that jumping so far in time would result in her losing her baby, but without her jump all life on Pern is doomed. Back at Telgar Weyr Fiona, Kindan and T'mar realise what Lorana has done. They are desperately sad, but two things give them hope. The first is that Fiona is expecting twins, and the second the fact that all the dragonriders are exhausted, a sign that they are Timing it - existing elsewhere in space and time - which gives them hope that Lorana has found a way through time to help them. Sure enough, led by messages left for them by Lorana, they fly through space to the Dawn Sisters, the ships hanging in space that brought their ancestors to Pern. From there they look down at the beautiful planet and see a previously undiscovered continent - this is where they are Timing it and where they are reunited with Lorana. Now they can increase the number and strength of the dragons before going back to their own time to fight Thread. Although Lorana found she couldn't break time, she has found a way to cheat it.

Young Fiona, rider of the gold queen Talenth, has returned from the past, where she and a group of dragons and riders fled so that the wounded could heal from their previous battles with Thread and the younger dragons could safely grow to fighting age. Gone only three days, yet aged more than three years, Fiona is no longer a child but a woman prepared to fight against the Thread that threatens to destroy her world.
Fiona's life takes a pivotal turn when a shocking tragedy thrusts her into a position of authority. Now she finds herself leading weyrfolk who have a hard time trusting a senior Weyrwoman who is both young and an outsider.
But even greater challenges lie ahead: Thread is falling and there are too few dragons to stem the tide. Many have died from the recent plague, and even with the influx of newly mature dragons from the past, the depleted fighting force is no match for the intensifying Threadfall. Fiona knows that something must be done, and what she proposes is daring and next to impossible. But if her plan succeeds, it just might save them all.
With a cast of familiar characters from previous Pern novels--including Lorana, who sacrificed her own queen dragon so that all the dragons of Pern would have a chance to survive, and Kindan, the harper Fiona has loved her whole life--Dragongirl is another triumph for Todd McCaffrey, and a riveting new chapter for the Dragonriders of Pern.

Kindan is an apprentice harper at the Harper Hall but he is finding the lessons very difficult and although he has his friends, Nonala, Kelsa and Verilan, he also has enemies, such as the bully Vaxoram. Things begin to improve for Kindan when he beats Vaxoram in a duel and Vaxoram becomes first his servant and then gradually his trusted friend. Then Kindan impresses a fire-lizard and becomes the proud owner of the magnicent Valla. At the hatching he meets Koriana, daughter of Lord Holder Bemin of Fort Hold. She also impresses and she and Kindan fall in love, but her parents disapprove and she has to return to Fort Hold. Then a plague begins to spread across Pern, killing nearly everyone infected. Kindan and his friends search the harper records to see if they can find a cure, but all they can find is mention of a similar plague over a hundred Turns past. As the plague gets worse Kindan and Vaxoram are sent to Fort Hold to help tend the sick. Kindan will be reunited with Koriana, but will she be free of the plague, and will he be able to find a cure before more people die?

After a vicious plague swept through the world of Pern, there are no longer enough dragons to fight off the current onslaught of Thread, the deadly spore that falls like rain from the skies and devours everything organic in its path. Pern's last best chance to rebuild the decimated dragon population lies with a group of young dragonriders and their dragons left stranded on an unexplored island. Leadership of these dragons and riders falls to Xhinna, female rider of a blue dragon, who, as the most experienced dragonrider in the new Weyr, must earn the respect of all who follow her, as not everyone is ready to accept a female wingleader. She must solve the problem of how to get sufficient numbers of dragon eggs, although her newfangled ideas, like letting green dragons mate and lay eggs to hatch new dragons, cause uproar. All the while she must protect her people and baby dragons from the predators and, worse, traitors or all hope for Pern will be lost!