Fighter pilot Spensa Nightshade has been embroiled in an alien empire's war and now, to figure out what she really is, she must leave her world behind to enter the Nowhere, a mysterious realm from which those who enter rarely ever return.

Tired of hiding in obscurity on Earth, Tina, the human clone of a brilliant alien tactician, pursues her destiny in space, but success is elusive until Tina and her best friend Rachel assemble a ragtag crew of humans and set out to save all the worlds.

"As she [Spensa Nightshade] is stuck in the Nowhere, Spensas companions FM and Jorgen in Skyward Flight are left on Detritus with a new mandate: figure out how to use the hyperdrives so that humanity can escape the planet and find allies among other species oppressed by the Superiority. First comes a distress call from Minister Cuna and other diones on the abandoned outpost of Sunreach. Alaniks people on the planet ReDawn and the Kitsen from the planet...

Luminara Uduli battles in the Arena of Doom; Aurra Sing hunts a bounty on the Smuggler's Moon; Obi-Wan disrupts the mission of an assassin; and a battle droid makes a career change.