The night before the finals, Yura, a trainee in a girl group, is forcefully thrown off a chair and wakes up to find herself in the body of a villainous princess in the kingdom of Adalante. Ironically, the princess happens to share her name. Just before the transmigration, Yura had finished reading "The Mystery of the Fall of Adalante," which reveals that the theories behind the kingdom's mysterious downfall all implicate the Princess.
As Yura piece together the events leading to Adalante's demise, she is faced with the choice of accepting her predetermined fate or taking action that may alter history. However, since the kingdom's fall reportedly coincides with the death of the Princess, her decision to interfere with destiny sets off a countdown to Adalante's destruction. Despite the odds against her, Yura is resolute in her mission to turn the tide and revamp history.