Iona Modrov, known as the emperor's sword, hound, and secret lover, endures a harsh life as the illegitimate child of the Modrov family. Despite her sacrifices, she is forced into a political marriage and ultimately betrayed by the emperor. On the brink of death, the only one who comes to save her is her unwanted husband, Duke Leroy Han. In her final moments, she asks for a last kiss before dying—only to wake up in the past before everything went wrong. Determined to change her fate, she runs to Leroy and boldly proposes: "Duke, marry me. This time, I will make you happy!" (Source: Kakao Entertainment Corp., translated)