Manaka Sajyou, intertwined with Akasha, craves to experience the unknown by delving into the concept of 'dreaming.' Venturing beyond the confines of the familiar world, she traverses time and space to a labyrinth housing an alternate Holy Grail War with four Servants and Masters vying for supremacy. Inhabiting the form of a Master who once summoned a female King Arthur, Manaka forges a connection with Saber as she grapples with her altered reality, where mirrors reveal a poignant reflection of her original self.