Scores of dragons are dead after plague swept across the world of Pern, and now the Weyrs are struggling to rebuild before Threadfall destroys everything—and everyone—left alive. Their best hope lies with a group of new dragonriders who have volunteered to brave the dangers of an unexplored island populated by vicious wild felines and voracious tunnel-snakes to create a safe home for their young dragons, whose offspring will hopefully replenish Pern’s decimated population. But their leader, Xhinna, the first female rider of a blue dragon, faces an uphill battle to win the respect of her peers, especially after tragedy leaves the new colony reeling. The way forward seems to lie with the awesome ability of the dragons to travel through time. But that power comes with risks: By venturing into the past, Xhinna may jeopardize the very future she has sworn to save.