"Cybersix" is a 13-episode anime series based on the Argentine comic book series of the same name. The narrative is set in the fictional city of Meridiana, a dark, gothic metropolis rife with corruption and danger. The protagonist, Cybersix, is a genetically engineered humanoid created by the sinister scientist Dr. Von Reichter. Designed as part of a series of superhuman soldiers, Cybersix rebels against her creator and escapes his control. To survive, she assumes the identity of Adrian Seidelman, a male high school literature teacher, while secretly fighting against Von Reichter’s creations and protecting the city.

Cybersix’s existence is precarious, as she requires a life-sustaining substance called "sustenance," which can only be obtained from other genetically engineered beings like herself. This necessity drives her to hunt down Von Reichter’s creations, known as "Fixed Ideas," which are monstrous entities unleashed upon Meridiana. Her dual life as Adrian and Cybersix is complicated by her growing bond with Lucas Amato, a fellow teacher who becomes romantically interested in her, unaware of her true identity.

The series explores themes of identity, humanity, and resistance against oppression. Cybersix’s struggle to maintain her secret while battling Von Reichter’s forces forms the core of the plot. Von Reichter, a megalomaniacal figure, seeks to reclaim Cybersix and continue his experiments, viewing her as his greatest creation. His son, José, a recurring antagonist, often clashes with Cybersix, driven by a mix of jealousy and loyalty to his father.

Supporting characters include Data-7, a shape-shifting panther-like creature who serves as Cybersix’s loyal companion, and Lori, a student who becomes suspicious of Adrian’s true identity. The series balances action-packed sequences with moments of introspection, delving into Cybersix’s internal conflict as she grapples with her origins and her desire to live a normal life. The narrative builds toward a climactic confrontation between Cybersix and Von Reichter, resolving key conflicts while leaving room for thematic exploration of freedom and self-determination.