The fierce battle in Olympus ended in Chaldea's victory over the Greek gods, as well as the confirmed simultaneous termination of the sixth Tree of Emptiness. Without the Tree of Emptiness, the sixth Lostbelt ceased to be a threat, leaving only the seventh Lostbelt to conquer. ...Or so it was believed. But the Observation Lens Sheba projects a different future: the imminent collapse of the planet itself, triggered by the sixth Lostbelt. There is hardly any time left until the planet's demise. To prevent this untimely end, Chaldea sets foot in a mystical island inhabited by faeries—the British Lostbelt.