Falsely accused of plotting to assassinate the realm's beloved Saint, Lady Alphina finds her engagement to the cold-hearted prince abruptly terminated. Her punishment is execution by guillotine. Upon her death, time rewinds, giving her a second chance to alter her fate. Yet despite every effort to prove her innocence, the same tragic end awaits her—death by beheading. This cycle of accusation and execution repeats itself a staggering ninety-nine times, with Alphina powerless to prevent the blade from falling.

The story takes place in a fantasy kingdom dominated by the political and religious authority of the Saint. After enduring ninety-nine lifetimes ending in death, Alphina begins her hundredth life with a newfound and unexpected advantage. Just as she faces execution once more, she awakens the magical ability to hear the thoughts of those around her. To her astonishment, she discovers that her supposed accusers and enemies do not hate her at all. Instead, their inner voices reveal a deep-seated affection, admiration, and love for her that their public actions had always concealed. Armed with this telepathic power to see through deception and uncover true feelings, Alphina is determined to finally change her destiny and survive her hundredth life.

As the protagonist, Alphina is a resilient noblewoman who transforms from a helpless victim of circumstance into an active agent of her own fate, using her wits and her new powers to navigate a world that has repeatedly betrayed her. The primary antagonist is the seemingly benevolent Saint Debonaire, whose false accusations set the entire tragedy in motion. The narrative arcs follow Alphina as she re-enters high society, using her mind-reading ability to discern friend from foe. She must contend with the outwardly frigid prince, whose true thoughts reveal an intense, hidden affection for her, as well as other nobles and officials whose secret adoration creates both comedic situations and powerful alliances. Later arcs see Alphina going on the run, infiltrating schools to protect allies, and even confronting the manipulative Saint directly, leading to desperate gambits that involve resetting the loop once more in an attempt to achieve a truly happy ending.