All is not well within Halkeginia. Tensions of war are rising, rumors of commoners wielding something greater than magic, and a cult that proclaims Brimir will return to finish his work is gaining traction. Louise summons a familiar, beginning the first motion of the mercurial tune, unknowingly pushing all ever closer to a decision: will they be slaves or follow their own star?

When two relics meet that should not have ever met, history is disrupted with 1942 Berlin, Germany as the epicenter. Immortal super-powered Nazis show up and destroy reality. Without a doubt: it's a new singularity. It's up to Chaldea to set things right, but when the foes are stronger than ever and use strange magic from another world, do they stand a chance?

Homura Akemi has known failure too many times. But then the impossible occurs, and she finds herself contracted with a former foe - one of the dangerous and enigmatic beings known as a Counter Guardian. Will this man's allyship and limitless stock of swords prove to be just the salve her hopeless quest needs, or will a miracle still not be enough to save what she holds dear?