The kingdom of Ile-Rien lies in peril, menaced by sorcerous threats and devious court intrigues. As the weak King Roland, flattered and misled by treacherous companions, rules the country, only his ruthless mother, the Dowager Queen Ravenna, guards the safety of the realm. But now rumors arise that Urbain Grandier, the dark master of scientific sorcery, has arrived to plot against the throne. And Kade, bastard sister of King Roland, appears unexpectedly at court. The illegitimate daughter of the old king and the Queen of Air and Darkness herself, Kade's true desires are cloaked in mystery.

Ile-Rien is in peril. A mysterious army known only as the Gardier has surrounded the country, attacking in ominous black airships. Hope is not lost though, for a magical sphere created by Ile-Rien's greatest sorcerer may hold the key to defeating the faceless enemy. But the sphere is unpredictable and has already claimed several lives. When a magical spell goes disastrously awry, young Tremaine Valiarde and a brave band are transported to another world-a world of rough magics, evil mages, honorable warriors, and a secret Gardier base.

Khat, a member of a humanoid race created by the Ancients to survive in the Waste, and Sagai, his human partner, are relic dealers working on the edge of society, trying to stay one step ahead of the Trade Inspectors and to support Sagai's family. When Khat is hired to find relics believed to be part of one of the Ancients' arcane engines, they are both reluctant to become involved. But the request comes from the Warders, powerful mages who serve Charisat's Elector.

In a corporate-dominated spacefaring future, planetary missions must be approved and supplied by the Company. Exploratory teams are accompanied by Company-supplied security androids, for their own safety. But in a society where contracts are awarded to the lowest bidder, safety isn’t a primary concern. On a distant planet, a team of scientists are conducting surface tests, shadowed by their Company-supplied ‘droid—a self-aware SecUnit that has hacked its own governor module, and refers to itself (though never out loud) as “Murderbot.”

While running away from home for reasons that are eminently defensible, Emilie’s plans to stow away on the steamship Merry Bell and reach her cousin in the big city go awry, landing her on the wrong ship and at the beginning of a fantastic adventure. Taken under the protection of Lady Marlende, Emilie learns that the crew hopes to use the aether currents and an experimental engine, and with the assistance of Lord Engal, journey to the interior of the planet in search of Marlende’s missing father.