One day a young woman named Blanca is saved by Xuan, a snake catcher from a nearby village. She has lost her memory, and together they go on a journey to discover her real identity, developing deeper feelings for one another along the way. But as they learn more about her past, they uncover a darker plot of supernatural forces vying for power, with the fate of the world hanging in the balance.

The year 2015 CE. The last era in which magecraft still thrived. The Chaldea Security Organization was founded to focus on preserving the continuation of human history. They observe a world which magecraft couldn't observe and science couldn't measure all to prevent the certain extinction of humanity. But one day, the future that Chaldea continued to observe disappears and humanity's extinction in 2017 becomes clear. Rather, it had already happened. The cause seems to be related to Fuyuki, a provincial town in Japan, in the year 2004 CE. There, an "unobservable region" that had not existed before appears. Based on the assumption that Fuyuki is the reason for humanity's extinction, Chaldea issues an order to explore, investigate, and possibly destroy this singularity – a quest for the Holy Grail, the Grand Order.

On the planet Latimer, Takeshi Kovacs must protect a tattooist while investigating the death of a yakuza boss alongside a no-nonsense CTAC.