"I never bargained on trying to save the world." Growing up on an ever-wandering ship with her three brothers, Callie McKinney never really interacted with the world outside the deck rails of the Evergreen. When new crew members join the four siblings, Callie gets a taste of just what a vast world lies waiting to be discovered- including the worldwide puzzle whose very beginnings are shrouded in mystery.

Blessed with incredible strength, Lia has always longed to be a true hero like the superstar phenoms that make up the Order of Defenders. A chance encounter with her adolescent idol, Vigil, catapults Lia into the big leagues, where she has the opportunity to make a real difference in the catastrophe-plagued Kingston City. But Lia quickly learns that sponsors, press, and presentation are as important to her new peers as saving the world! Worsening matters: Vigil makes clear that he thinks she shouldn't be in the hero business at all. Lia must fight for her dream, though the reality is far from what she imagined. And she must do it quickly, before the dark power that has plagued Kingston for decades consumes her and Vigil both.

Get out of the way, heroes and heroines: it's the losers' turn to save the world! Agatha is an ill-tempered boarding school student inside whose mind a secret has been implanted by the secretive Order of Remembrance; Tristan is a clumsy dreamer looking for his occasion to perform heroic deeds. Keeping fugitive Agatha safe for a single night seems Tristan's great occasion, but he doesn't know he's going to get way more than he bargained for. For nineteen centuries, the ancient machines called Faraway Bridges have connected the Lands Beyond, the remote places where mankind dwells, but now the Bridges are dying and crossing them is almost lethal. Hiding in fortified abbeys, the Libraries, the Order of Remembrance has the mission of finding a way to heal the Bridges before they become impassable, but the Awakening League wants to seize control of the Bridges for its own plans of conquest, and is storming the Libraries one by one to steal the Order's knowledge. Caught in the crossfire of the centuries-long war between the Order of Remembrance and the Awakening League, chased by monsters and machines across lands and skies, Tristan and Agatha embark on a quest to unveil the secret inside Agatha's mind, and end up realizing that Agatha is the key to an ancient power that can heal their dying world.