After experiencing death nine times, Selene Vixent is tired of being betrayed by her fiancé, mistreated by her noble family, and meeting tragic ends due to her inability to unlock the power of the Sun, a family heirloom. Determined to break free from this cycle, Selene embraces the power of Shadow, marking her transformation into a villainess after her ninth demise. However, her path takes a surprising twist when Dier Veldt, the ex-crown prince, reveals his knowledge of her time loop and offers aid with one condition – she must end his life. With newfound darkness, Selene must navigate this unconventional partnership and challenge her fate in a bid to escape the perpetual time loop.