Magano is a parallel world teeming with monsters called Kegare, where exorcists confront every impurity that threatens the balance of existence. Benio Adashino, a prodigious exorcist famed for her formidable power, is summoned to Tokyo by the Exorcist Union after a series of alarming incidents. On her journey she falls into the care of Rokuro Enmadou, a young exorcist haunted by a troubled past and a reputation for daring feats.
Yet the impurities in Magano never cease. When these two exorcists witness children snatched by a Kegare, Benio rushes to rescue them, dragging Rokuro with her back into the perilous realm. In a fierce battle where she nearly succumbs, Rokuro saves her, proving he could rival her in skill and determination.
Sousei no Onmyouji follows two gifted exorcists destined to become the Twin Star Exorcists and the foretold parents of Miko—the reborn Abe no Seimei—who will purify the world from all lingering impurities for everyone and beyond.