After surviving a brutal terrorist attack on Plant Quetta, Suletta Mercury returns to dueling at the Asticassia School of Technology, while Miorine Rembran sits at her injured father's side, waiting to see if he will recover. As the residents of Earth House are preoccupied with their respective troubles, two members of Dawn of Fold—the perpetrators of the attack—secretly infiltrate the school, putting Suletta and her friends at risk. At the same time, Prospera, Suletta's mother, approaches Miorine to propose the continuation of "Quiet Zero"—a project headed by Miorine's father that can allegedly end all war. Prospera seems to be another political figure with hidden, opposing motives, and whether she truly has Suletta's well-being at heart remains to be seen. Suletta Mercury, who transferred from Mercury into the Asticassia School of Technology, has lived a school life filled with meetings and excitement, as Miorine Rembrans groom and a member of Gund-Arm, Inc. Two weeks have passed since the incident at Plant Queta and Suletta spends her days at the school looking forward to seeing Miorine again. Miorine, on the other hand, is at the headquarters of the Benerit Group, monitoring her fathers condition. The two girls are faced with new difficulties and decisions that must be made. With their own feelings in their hearts, the girls confront the powerful curse brought about by the Gundam.