In a surprise attack that killed many of her dearest subjects, Hail Bristol, empress of Indrana, has been captured by the Shen-the most ruthless and fearsome aliens humanity has ever encountered. As she plots her escape, the centuries-long war between her captors and the Farians, their mortal enemies and Indrana's oldest allies, finally comes to a head. When her captors reveal a shocking vision of the future, Hail must make the unexpectedly difficult decision she's been avoiding: whether to back the Shen or the Farians.