The discovery of a black crystalline mineral known as Originium has accelerated technological advancement in the world of Terra, with its high energy yield allowing people to demonstrate abilities akin to magic called Arts. Large veins of Originium can naturally be found at the sites of Catastrophes, various forms of natural disasters caused by the mineral itself. However, the usage of Originium comes at a price, as there is a high risk of getting infected with Oripathy—an incurable and highly contagious disease. Because nations subject the infected to harsh discrimination, the oppressed begin a dissident movement. Calling themselves Reunion, the rebel faction mercilessly destroys cities, further contributing to the already calamitous nature of Catastrophes. Rhodes Island, committed to treating the infected and uninfected as equals, is a paramilitary pharmaceutical organization believed to be the most advanced in its research for the Oripathy cure. Unfortunately, the person spearheading the project—an enigmatic figure known only as the Doctor—suffers from amnesia, effectively impeding what might be the only hope for the infected to break free from their chains of despair. [Written by MAL Rewrite]

Rebel organization Reunion has reduced the city of Chernobog to ashes and despair. That is only the beginning of its uprising against the nations prejudiced toward those infected with the highly contagious and deadly disease Oripathy. Now, the rebels have set their sights on Lungmen—a prosperous city infamous for its inhumane treatment of the sick. After witnessing Reunion destroy her homeland, Chief Ch'en of the Lungmen Guard Department's Special Inspection Unit leads her squad to defend her city. Meanwhile, Amiya, the Doctor, and the rest of the advanced pharmaceutical company Rhodes Island continue to oppose Reunion on all fronts. However, they soon find themselves in a deadlock against a powerful enemy: FrostNova, a Reunion commander whose fearsome wintry powers cause anyone unfortunate enough to stand in her way to slowly perish in frost. [Written by MAL Rewrite]

With the threat of Ursus and Reunion doubling down upon Lungmen, Ch'en, once the city's fiercest defender, renounces her loyalties before Lungmen's Chief Executive Wei Yenwu, revealing herself as Infected and the sister of Talulah, Reunion's enigmatic leader. Cast adrift from Lungmen with an arrest warrant, Ch'en sets out to confront Reunion, convinced that she alone can deliver the reckoning her sister deserves. As Rhodes Island intervenes to prevent total annihilation, Doctor, Amiya, Kal'tsit, and the rest of the team hope to navigate a conflict where the faintest spark of justice may at last ignite Lungmen's rise from its embers. [Written by MAL Rewrite]