10 years ago, the Emperor of the Sun Empire was assassinated by the Archduke. But thanks to the Lord's protection, the Crown Prince and his little brother were saved by the nanny. However, the assassination led to a great chaos in which the empire was destroyed, as the people lived in poverty and hunger for a long time, and became known as the Empire of Ashes. After the Crown Prince takes control, trying to restore the empire to what it was, the latter finds a mysterious girl suffering from memory loss. She wakes up from her coma and claims that her name is Barbara. As time passes, the girl begins to appear more mysterious and becomes more strange day after day. Despite many attempts to search for her background and find out her identity, he did not find anything, and as soon as her memory returned, things turned upside down, as the secrets of a traumatic past that occurred a decade ago were revealed, which led to the change of the world. Barbara, the evil character who was hidden behind her mystery, now begins to reveal her buried secrets. Was her name really Barbara? What secrets does she hide that will reveal her true identity?