"Woodpecker Detective's Office" is a historical mystery anime set in early 20th-century Japan, blending elements of detective fiction with real-life literary figures. The story centers on Kyosuke Kindaichi, a struggling poet and part-time detective, and his friend, the eccentric and sharp-witted Takuboku Ishikawa, a renowned poet. Together, they operate the Woodpecker Detective's Office, taking on cases that often intertwine with the cultural and intellectual milieu of the Taisho era.

The narrative unfolds through a series of episodic mysteries, each delving into peculiar incidents that reflect the societal tensions and artistic movements of the time. Kindaichi and Ishikawa investigate cases ranging from supernatural phenomena to crimes rooted in human greed and ambition. Their investigations frequently lead them to interact with historical figures, including writers, artists, and intellectuals, grounding the story in a rich historical context.

Kindaichi, the more grounded and methodical of the duo, often serves as the voice of reason, while Ishikawa's impulsive and unconventional approach drives much of the action. Their dynamic partnership is central to the series, with their contrasting personalities creating both tension and camaraderie. Supporting characters, such as the enigmatic geisha Yayoi and the resourceful journalist Kikuchi, add depth to the narrative, providing additional perspectives and aiding in the investigations.

The series explores themes of art, identity, and the human condition, often using the mysteries as a lens to examine the cultural and political shifts of the era. The cases frequently blur the line between reality and illusion, challenging the protagonists to navigate a world where truth is often obscured by layers of deception and symbolism. The historical setting is meticulously recreated, with attention to period details that enhance the authenticity of the narrative.

As the story progresses, the episodic structure gives way to a more interconnected plot, revealing deeper connections between the cases and the personal histories of the characters. The series balances its mystery elements with moments of introspection, offering a nuanced portrayal of its protagonists and their struggles. The blend of historical fact and fictional storytelling creates a compelling narrative that appeals to fans of both mystery and historical drama.