In the aftermath of the Battle of Exegol, the remnants of the First Order and Sith Eternal begin the construction of two conjoined Star Destroyers that house a large superlaser capable of destroying planets. Using Sith alchemy, they are also able to create two Force-sensitive biological twins named Karre and Am, who they then train in the dark side of the Force. The twins eventually become the leaders of the remnant and plan to use their superweapon to destroy the New Republic. However, Karre goes rogue on the day the weapon is supposed to be fired due to him having a vision of the future involving his sister's death; he also steals the large kyber crystal that powers the superweapon...