After the events that transpired in Seattle, the faculty at Skyship Academy have kept Jesse a prisoner in his own home, fearful of his ability to break Pearls. Cassius has escaped to the Polar Cities of Canada, fleeing the Unified Party — the very organization he’d once counted himself a part of.
But when Jesse manages to smuggle onboard the Academy a mysterious red Pearl, he sets forth a destructive chain of events that leads him back to the Fringes and to a reunion with Cassius. It's there that the brothers meet Madame’s newest protégé, a troubled youth with a dangerous secret waiting to be unlocked.
But a larger threat looms in the stars. Together, Jesse and Cassius must race against the clock, and those they thought they could trust, to prevent extermination at the hands of their ultimate enemy — an enemy hatched from crimson and ready to strike.