Yun Ha Na is a top actress adored across Asia, living a glamorous life at the height of her career. But after a mysterious accident causes her soul to switch with that of her twin brother, Yun Ha Ru, she suddenly finds herself thrown back into the past. Faced with a second chance to change fate, Ha Na becomes determined to save her first love, Jung U Jae — a former judo prodigy turned bodyguard who once lost his life protecting her.

As Ha Na struggles to navigate the past in the midst of unexpected chaos, Ha Ru must cope with waking up in his sister’s body, leading to a series of unpredictable and emotional moments. Alongside them is Son Ye Rang, Ha Na’s powerful agency CEO and Ha Ru’s devoted lover, whose strong exterior hides a deeply vulnerable side.

Four young people whose intertwined destinies challenge love, sacrifice, and the possibility of rewriting the past.