Some say the world will end in fire,
Some say in ice.
From what I’ve tasted of desire
I hold with those who favor fire. 

The Wild Hunt pirates were Endeavour’s oldest enemy, the foe whose devastating attack brought aboard so many of the current crew – including Captain Rourke. A select few knew the truth: these so-called pirates were enemies from another reality, dark copies of people they knew trapped in this universe and struggling to return home, with no scruples or principles to hold them back. For over a year, Endeavour’s crew has known their counterparts are out there. But when an away team stumbles upon the imperial warship Endeavour and are taken captive by enemies who look like loved ones, the uncertainty is at an end.

For Dathan Tahla, agent of the Terran Empire undercover on Endeavour, the uncertainty has only reached its nadir. Months ago she turned her back on her handlers, killing a man sent to recover her, and committed herself to this false life under a mask she knew couldn’t last. Now she’s back in the hands of those who sent her, those who expect her obedience, and it would be easy, so easy, to return to her old way of living.

But the cost of that comfort will be the lives of those she’s learnt to care about.