Seventeen years ago, Adelaide Chamille Borbon emerged from a car accident reborn, but her existence has been underwhelming. Trapped in a privileged life as a noblewoman living in the quiet countryside, Adelaide yearns for adventure before her impending arranged marriage. However, everything changes when she learns of a mysterious woman from another dimension with dark hair, compelling Adelaide to race to the capital and meet this enigmatic "saint" at the debutante ball.
Meanwhile, Felix Mikhail Noah Elias is tired of the rumors and lies surrounding him and the alleged "saint." He realizes she is a manipulative individual seeking to deceive him and others for her own benefit. To rid himself of the unwanted weight and the negative image that comes with it, Felix must quickly find an aristocratic lady and become engaged.
Adelaide and Felix's paths converge when he approaches her, requesting that she act as his pretend fiancée. Despite Felix claiming that their relationship will remain platonic, he may find it challenging to keep his feelings at bay as Adelaide accompanies him on his journey.
