The Emperor's Sword, the Emperor's Dog, and the Emperor's Secret Lover, Iona Modrov, a knight. Born as the illegitimate child of the Modrov family, she endured harsh training and verbal abuse from her family to become the Emperor's knight, but all she got in return was a political marriage with someone she didn't want, and the Emperor's betrayal. "Iona, come to your senses." The only one who came to save Iona, who was on the verge of death due to the Emperor's betrayal, was Iona's husband through a political marriage, Duke Leroy Han. Iona had no feelings for Leroy, but in her last moments of life, she asked Leroy a favor. "Please kiss me. It's my last wish before I die." "If that's what you wish for..." Iona, who died after their first and last kiss, returns to the past before she died with Leroy. And Iona runs to her husband Leroy, who came to save her only, and says, "Duke, please marry me. I will make you happy!"