Kaito Tanaka, a calligrapher haunted by a magical accident that claimed his mother's life, has renounced his power. His life is upended when Yuki, a timeless spirit of a hairpin, flees from the Kage Corporation, which harvests beings like her for fuel.

To protect Yuki and atone for his past, Kaito must reclaim his legacy as an Ink-Mage. Mastering the art of magical calligraphy, he becomes the last hope against a corporate empire devouring the world's soul. Together, Ink and Ice must unite to fight a shadow that consumes all magic.