"Neo Angelique Abyss -Second Age-" is a 12-episode anime series that serves as a sequel to "Neo Angelique Abyss." The story is set in a world plagued by Thanatos, monstrous entities that threaten humanity. The protagonist, Angelique, is a young woman with the rare ability to purify these creatures, making her a key figure in the fight against them. She is accompanied by Nyx, a mysterious and powerful warrior who serves as her protector, and a group of talented individuals known as the Elements, each possessing unique abilities tied to natural forces.

The narrative begins with Angelique and her companions continuing their mission to combat Thanatos and restore balance to the world. As the story progresses, the group faces increasingly dangerous threats, uncovering deeper mysteries about the origins of Thanatos and the true nature of their powers. Angelique's role as the "Purifier" becomes more significant as she learns to harness her abilities, while Nyx's enigmatic past and connection to the Thanatos are gradually revealed.

The series explores themes of sacrifice, duty, and the bonds between its characters. Angelique's relationships with Nyx and the Elements are central to the plot, as they navigate challenges that test their resolve and unity. The story also delves into the emotional struggles of its characters, particularly Angelique, who must balance her responsibilities with her desire for a normal life.

The pacing of the series is brisk, with each episode advancing the overarching plot while introducing new conflicts and character developments. The world-building is consistent with the established lore of the "Angelique" franchise, blending fantasy elements with a touch of romance and adventure. The anime concludes with a resolution that ties up major plot threads while leaving room for further exploration of its universe.

Main characters include Angelique, the compassionate and determined Purifier; Nyx, the stoic and protective warrior with a hidden past; and the Elements—Rayne, Bernard, Hyuga, and others—who each contribute their unique skills to the group's efforts. The interactions and dynamics between these characters drive much of the narrative, creating a balance between action and emotional depth.