"Kataribe Shōjo Honoka" centers on Honoka, a young girl who serves as a kataribe, a storyteller tasked with preserving and sharing the history of her world. The narrative unfolds in a post-apocalyptic setting where humanity has been decimated by a catastrophic event known as the "Great Collapse." Honoka travels across the desolate landscape, collecting fragments of the past and recounting tales to those she encounters. Her role is not merely to entertain but to ensure that the memories of the old world are not lost, as they hold the key to understanding the present and shaping the future.

The story begins with Honoka arriving in a small, isolated village where she meets a group of survivors struggling to rebuild their lives. Through her interactions with the villagers, she uncovers their personal histories and ties them to the broader narrative of humanity's downfall. Each episode delves into a different tale, often blending folklore, personal anecdotes, and historical events, all woven together by Honoka's narration. These stories reveal the resilience, flaws, and hopes of the people who lived before the collapse, offering insights into the causes of the disaster and the lessons that can be learned from it.

Honoka is accompanied by a mysterious, sentient artifact known as the "Memory Stone," which aids her in recalling and recounting the stories she collects. The stone also serves as a guide, leading her to locations of historical significance and individuals whose memories are crucial to her mission. As the series progresses, Honoka's journey becomes more than a quest to preserve the past; it evolves into a search for the truth behind the Great Collapse and her own origins. Clues scattered throughout the stories she tells hint at a deeper connection between her and the events that reshaped the world.

The series explores themes of memory, loss, and the enduring power of storytelling. Honoka's tales often highlight the fragility of human civilization and the consequences of hubris, greed, and neglect. At the same time, they celebrate the resilience of the human spirit and the importance of preserving knowledge for future generations. The narrative structure is episodic, with each story contributing to a larger, interconnected tapestry that gradually reveals the full scope of the world's history and Honoka's place within it.

The main characters include Honoka, the determined and compassionate kataribe; the Memory Stone, a cryptic and enigmatic companion; and various villagers and survivors whose lives and memories shape the stories Honoka tells. Each character, whether central or peripheral, plays a role in uncovering the truths of the past and the possibilities for the future. The series balances its exploration of heavy themes with moments of warmth and humanity, creating a poignant and thought-provoking narrative.