Waking from a fatal accident to find herself in the past, Han Yi-joo teams up with Seo Do-guk to take revenge on the family who never loved her.
A homicide squad detective, suspected of serial murder, searches for the real culprit.
In an alternate-reality South Korea, where a constitutional monarchical system prevails, Oh Sunny, a musical actress, becomes the empress of the country. Thus begins a dispute for power in the royal palace. Nothing is what it seems, and Oh Sunny is ready to fight until the end to uncover a mysterious homicide within the royal palace, fighting to protect those she loves the most and obtain happiness.
