"Tales of the Abyss: Jade's Secret Memories" is a manga adaptation that delves into the backstory of Jade Curtiss, a prominent character from the "Tales of the Abyss" universe. The narrative explores Jade's past, focusing on his early life, his rise within the Malkuth Empire's military, and the events that shaped his complex personality. Central to the story is Jade's relationship with his mentor, Professor Nebilim, whose groundbreaking research on Fonons and the Seventh Fonon becomes a pivotal element in the plot. The manga also examines Jade's involvement in the development of the fonic glyph technology and the moral dilemmas he faces as his work intersects with the empire's political ambitions.

The story intertwines Jade's personal struggles with broader political intrigue, as the Malkuth Empire seeks to leverage his scientific expertise for military dominance. Key events include Jade's participation in the Hod War, where his actions have far-reaching consequences, and his eventual disillusionment with the empire's motives. The manga also sheds light on Jade's interactions with other central characters from the "Tales of the Abyss" series, providing context for his role in the main storyline. Themes of loyalty, ambition, and the ethical implications of scientific advancement are woven throughout the narrative, offering a deeper understanding of Jade's character and his motivations. The manga serves as a prequel, enriching the lore of the "Tales of the Abyss" series while maintaining a focus on Jade's personal journey and the secrets that define his legacy.