In an alternate universe where Korea is ruled by a constitutional monarchy, Sunny, a bright and optimistic commoner musical actress, is suddenly thrust into the royal spotlight through an orchestrated marriage to the Emperor. Sunny’s dream-come-true quickly spirals into a nightmare as she finds herself caught in a deadly palace power struggle and a mysterious murder that threatens the monarchy. Surviving the palace’s treacherous politics becomes a battle for her life. Winning the Emperor’s heart is no longer her priority; Sunny must outwit ruthless enemies or risk becoming their next victim. Her only hope lies in her unexpected ally Wang-Sik, a Knight in Shining Armor bodyguard with a personal vendetta. As secrets unfold and danger grows, Sunny must find justice and love amid the chaos. Will she escape the palace’s deadly grip and find happiness or be consumed by its power games?