"The Betrayal Knows My Name" is a supernatural fantasy anime centered around Yuki Sakurai, a young man with the ability to sense the emotions of others through physical contact. Orphaned as a child, Yuki grows up with a deep sense of loneliness and a desire to understand his mysterious past. His life takes a dramatic turn when he encounters a group of individuals known as the Zweilt, warriors tasked with protecting humanity from demonic entities called Duras. These Duras feed on human emotions and seek to plunge the world into chaos.

Yuki learns that he is the reincarnation of a powerful figure from a past life, connected to a tragic betrayal that occurred centuries ago. His memories of this past life gradually resurface, revealing his ties to Luka Crosszeria, a stoic and enigmatic Zweilt warrior. Luka harbors a deep bond with Yuki, rooted in their shared history, and becomes his protector. As Yuki uncovers more about his past, he discovers that his existence is pivotal to the ongoing battle between the Zweilt and the Duras.

The narrative explores themes of loyalty, sacrifice, and the complexities of human emotions. Yuki’s journey is intertwined with the struggles of the Zweilt, each of whom possesses unique abilities and personal burdens. Characters like Tsukumo, a cheerful yet determined Zweilt, and Kanata, a young boy with a tragic connection to the Duras, add depth to the story. The series delves into the relationships between these characters, highlighting their camaraderie and the emotional toll of their duties.

As the conflict escalates, Yuki must confront the truth about the betrayal that shaped his past life and its implications for the present. The story balances action-packed battles with introspective moments, examining the characters’ motivations and the moral ambiguities of their fight. The anime concludes with a resolution that ties together the threads of Yuki’s past and present, offering closure to the central conflict while leaving room for reflection on the enduring impact of betrayal and redemption.