Long ago, this land was home to beasts the size of mountains that have now become petrified. Mana overflowed from their remains, drawing people who sought its power, and civilizations sprang up. People came to revere these mana-producing creatures, which they named 'Primordial Beasts'. They built their lives around them. Thus began the worship of the Primordial Beasts.
Time flowed ever onward, to the present day... War erupts between the Jerle Federation, an alliance of countries who worship the Primordial Beasts, and the Gildllan Empire, which has enjoyed explosive development thanks to advanced technology. The fires of war burn ever brighter.
The special animated feature will tell an important juncture in the story of Luminaria, congealing and bringing to life the game's theme of "confronting antagonistic ideas of justice"!
(Source: Official website)
— Description from AniList community (anilist.co).
