"Innocent: Shōjo Memoria" is a historical drama anime set in 18th-century France, blending elements of romance, tragedy, and political intrigue. The narrative centers on Charles-Henri Sanson, a young executioner from a family tasked with carrying out state-sanctioned executions. Despite his lineage, Charles-Henri struggles with the moral weight of his role, yearning for a life beyond the bloodstained legacy of his family. His internal conflict is further complicated by his growing affection for Marie, a kind-hearted girl who represents the innocence and purity he feels he can never attain.

The story unfolds against the backdrop of pre-revolutionary France, where societal tensions are rising, and the aristocracy's excesses contrast sharply with the suffering of the common people. Charles-Henri's family, the Sansons, are caught in this divide, respected for their duty yet ostracized for their grim profession. As Charles-Henri navigates his personal turmoil, he becomes entangled in the lives of those around him, including his father, who embodies the cold professionalism of their trade, and his younger sister, who shares his longing for a different life.

Marie, a central figure in the narrative, serves as a symbol of hope and redemption for Charles-Henri. Her unwavering compassion and belief in his inherent goodness challenge his perception of himself and his destiny. However, their relationship is fraught with obstacles, as societal expectations and the harsh realities of their world threaten to tear them apart. The series explores themes of fate, morality, and the human capacity for change, as Charles-Henri grapples with whether he can escape the cycle of violence and find a path to redemption.

The plot is driven by both personal and external conflicts, as Charles-Henri's journey intersects with the broader historical events of the era. The series delves into the complexities of loyalty, duty, and love, painting a poignant portrait of a young man caught between his inherited role and his desire for a different future. Through its exploration of these themes, "Innocent: Shōjo Memoria" offers a compelling and emotionally resonant narrative set in a richly detailed historical context.