As the Commonwealth makes more starships and increases recruits, victory begins to slip from Theocratic control. This may just make the Theocracy even more desperate to earn . and more dangerous to fight.

After a mission to liberate an occupied planet ends in nuclear devastation, Kat Falcone—right now a commodore in command of HMS Queen Elizabeth—sees firsthand just how far the enemy goes. Suddenly dealing with the battle work and a humanitarian turmoil, many in the Commonwealth desire a truce. Kat wants another thing: to crush the Theocracy outright—and quickly.

Kat devises Procedure Hammer, an all-out assault over the foe home planet, Ahura Mazda. It is a vivid and risky program, but the enemy has revealed there can be no middle ground. Can Kat break the galactic stalemate and deal a deathblow towards the Theocracy? As two empires prepare to combat the largest space battle ever sold, Kat must trust her instincts to save lots of her people and avoid oblivion.