Former warrior queen and now pariah, Cold Zosia wakes in the ashes of a burning city. Her vengeance has brought her to this --- her heroic reputation in tatters, her allies scattered far and wide, and her world on the cusp of ruin. General Ji-Hyeon has vanished into the legendary First Dark, leaving her lover Sullen alone to carry out the grim commands of a dead goddess. The barbarian Maroto is held captive by a demonic army hell-bent on the extermination of the Crimson Empire, and only his protégé Purna believes he can be saved. Zosia must rally her comrades and old enemies one last time, for what will prove the greatest battle of her many legends...if anyone lives to tell it.

After 500 years, the Sunken Kingdom has returned and brought with it a monstrous secret that threatens to destroy every country on the Star. As an inhuman army gathers on its shores, poised to invade the Immaculate Isles, the members of the Cobalt Company face an ugly choice: abandon their dreams of glory and vengeance to combat a menace from another realm, or pursue their ambitions and hope the Star is still there when the smoke clears.

Twenty years ago, feared general Cobalt Zosia led her five villainous captains and mercenary army into battle, wrestling monsters and toppling an empire. Now the peace she carved for herself after retiring has been shattered by the unprovoked slaughter of her village. Seeking bloody vengeance, Zosia heads for battle once more, but to find justice she must confront grudge-bearing enemies, once-loyal allies, and an unknown army that marches under a familiar banner.