Spirits known as kamui are thrown into chaos when the sacred spirit Okikurumi is taken from Atsuma's village, and the imbalance threatens to destroy Earth. Infused with a spirit of an ancient sword, Atsuma must leave his village to reclaim Okikurumi. After encountering NOA - an organization of youths who wield the power of the kamui and who may hold the key to Okikurumi, Atsuma is recruited by Sumire, a young woman with an empty soul who yearns for a miracle. Atsuma and his new companions must work together to find Okikurumi before the world is destroyed.
Reminds me of X:1999. Atsuma is on a quest to find the Okikurumi and thinks it's hidden inside NOA somewhere, so at the invitation of Sumire, one of the three highest generals of NOA, he joins to investigate further. There has been a series of earth quakes that have destroyed civilization in Japan and NOA is now the only line of defense against ATA monsters.