"Ichirin-sha" is a supernatural drama anime centered around a mysterious organization that investigates and resolves paranormal phenomena. The story unfolds in a world where spirits, ghosts, and otherworldly entities coexist with humans, often causing disturbances that require specialized intervention. The protagonist, a young woman named Aya Ichinose, possesses the unique ability to perceive and communicate with spirits, a gift inherited from her late grandmother. After a tragic incident involving her family, Aya is recruited by the titular Ichirin-sha, a secretive group dedicated to maintaining the balance between the human and spirit realms.

The narrative follows Aya as she navigates her new role within Ichirin-sha, working alongside a diverse team of individuals, each with their own abilities and motivations. The team includes Kaito, a stoic exorcist with a troubled past; Rina, a cheerful medium who serves as the emotional anchor of the group; and Haruto, a tech-savvy researcher who develops tools to combat supernatural threats. Together, they tackle a series of cases involving vengeful spirits, cursed objects, and malevolent entities, each case revealing deeper layers of the world’s spiritual mechanics and the personal histories of the characters.

As the series progresses, Aya uncovers the truth about her grandmother’s connection to Ichirin-sha and the organization’s darker, hidden agenda. The plot delves into themes of loss, redemption, and the consequences of meddling with forces beyond human understanding. The story builds toward a climactic confrontation with a powerful entity that threatens to disrupt the fragile equilibrium between the living and the dead, forcing Aya and her team to confront their own fears and moral dilemmas.

The anime balances episodic case resolutions with an overarching narrative, weaving together character development and world-building. The interactions between the team members highlight their growth as individuals and as a cohesive unit, while the supernatural elements provide a backdrop for exploring deeper philosophical questions about life, death, and the nature of existence. "Ichirin-sha" offers a compelling blend of mystery, action, and emotional depth, making it a notable entry in the supernatural genre.