She and Avenger set off to fight and win the Holy Grail War.
Bazett Fraga McRemitz, a member of the Mages' Association and a master in the Fifth Holy Grail War, wakes on the fourth day of the Fifth Holy Grail war with a new servant, Avenger, and no memory of what happened to her beforehand. Like its predecessor, the story is set in Fuyuki City.
The plot of Fate/hollow ataraxia is set about 8 months after the events of Fate/stay night.