Known as the "Cold-Blooded Prince", Dietrich was infamous for his inability to understand human emotions. Following the wishes of his power-hungry mother, he ascended the throne at the age of 17—only for fate to deal him a cruel hand. His younger brother, Oscar, beloved by the people for his warm, sun-like smile, seized the throne, and Dietrich was publicly executed. However, in the very moment his head was severed—he woke up, finding himself back in his 13-year-old body, four years in the past. Had time truly rewound? He could still remember the sensation of his own beheading. Perhaps it was a miracle from the goddess Dahlia, but if he had been given a second chance, this time, he would do things differently. Above all, he wanted to make his fiancée, Marguerite, truly happy. In his past life, he didn’t know how to love. Because he cherished her, he kept her at a distance, treating her coldly. And yet, no matter how much pain he caused, she remained kind to him—even offering prayers for him until the very moment of his execution. This time, he won’t make the same mistakes. No matter what, he will survive and grasp happiness alongside Marguerite! Thus begins the revenge of the prince who would later be known as the "Wise King"!