In her previous life, she was a strong woman who was assassinated by her pillow. After her death, she was reborn into a scrappy noble girl, and before she could enjoy the joy of her new life, she was plunged into a post-apocalyptic crisis. In this era where the strong are honored, she rises strongly and explores the mystery of her death in her previous life. However, she discovers that a familiar person from her previous life has also been reborn, and gradually uncovers the truth of the real post-apocalyptic crisis.