The game takes place 20 years after the events of Final Fantasy Tactics. The story follows Luso Clemens, a student at St. Ivalice Monastery, who becomes trapped in a mysterious book known as the Grimoire of the Rift. This book serves as a portal to different worlds and timelines, setting the stage for Luso's adventures. Alongside his friends, Ramza and Tietra (who are familiar to fans of the first game), Luso navigates through various scenarios, battling foes and unraveling the mysteries of the Grimoire.