In an alternate timeline where Palpatine is eternally dead, and Supreme Leader Snoke is an entity that came unto his own, the sudden reappearance of a lost Imperial fleet diverts General Hux's attention away from the tensions of the Galactic Cold War. With potential new allies and strategic opportunities within his grasp, Hux assigns Captain Phasma as a liaison to the Imperials in hopes she will entice them into formally joining the First Order.

Unbeknownst to Hux, Imperial Admiral Garren Prolov harbors dark secrets and a past connection with Phasma that threatens to undermine the First Order's plans for the Imperial remnant. As a diplomatic and tactical chess game initiates between the First Order and the Imperials, an ancient evil awaits in the shadows for its opportunity to enact sinister plans of its own for Prolov and his fleet.

Friend will become foe. Allies will become enemies. And the galaxy will have to rely upon the most unlikely of heroes to prevent an ancient evil from utterly enslaving it.