"Kamikaze Kaitou Jeanne" centers on Maron Kusakabe, a high school student who leads a double life as the titular phantom thief, Jeanne. Her mission is to locate and reclaim pieces of the divine power sealed within artworks, which have been corrupted by demons. These demons possess the art, turning them into vessels for evil. By stealing the artworks, Jeanne purifies the demons and restores the divine fragments, aiming to prevent the resurrection of a malevolent entity known as Finn Fish.

Maron’s alter ego, Jeanne, is guided by the angel Finn, who communicates with her through a small, doll-like accessory. Finn provides Maron with the knowledge and tools necessary to carry out her missions, including the ability to transform into Jeanne and wield divine powers. However, Maron’s life becomes increasingly complicated when a rival phantom thief, Sinbad, emerges. Sinbad’s motives and identity remain shrouded in mystery, creating tension and rivalry between the two thieves. Unbeknownst to Maron, Sinbad is actually her childhood friend and classmate, Chiaki Nagoya, who is also working to collect the divine fragments for his own reasons.

As Maron balances her school life, friendships, and secret identity, she faces moral dilemmas and emotional challenges. Her best friend, Miyako Todaiji, becomes suspicious of Maron’s activities, adding another layer of complexity to her dual life. The series explores themes of duty, sacrifice, and the struggle between good and evil, as Maron grapples with the weight of her responsibilities and the consequences of her actions.

The narrative unfolds through a series of episodic heists, each focusing on a specific artwork and the demon it harbors. These episodes are interspersed with character development and revelations about the overarching plot. The relationship between Maron and Chiaki evolves as their shared past and conflicting goals come to light, culminating in a deeper understanding of their roles in the battle against Finn Fish.

"Kamikaze Kaitou Jeanne" blends action, mystery, and romance, with a focus on Maron’s growth as both a person and a protector of the divine. The series maintains a balance between its supernatural elements and the personal struggles of its characters, creating a compelling and cohesive story.