Universal Century 0085. Five years have passed since the end of the One Year War, which saw the Principality of Zeon proclaim victory, and Char Aznable and his gMS-α Red Gundam disappear in a mysterious phenomenon known as a Zeknova. After running into a girl named Nyaan, high schooler Amate Yuzuriha gets pulled from her quiet life on the Izuma colony at Side 6, into the world of illegal mobile suit dueling after getting into the cockpit of Zeon's new prototype Gundam, the gMS-Ω GQuuuuuuX.
