Lee Jae-in, an ordinary high school student who dreams of becoming a makeup artist accidentally picks up a lipstick and gets sucked into the mirror by it. When she opened her eyes, she was no longer Lee Jae-in, a high school student with an ordinary face, but Jane Richard Dautriche, the princess of Roemendel, a beauty who is perfect in everything. Besides, she’ll be marrying the Crown Prince...!  Relying on lipstick, which is the only key to returning to her present life, she searches for a way. But instead of coming back, Jae-in only able to return her original face. With the mysterious lipstick in her hand and the makeup skills she has accumulated over the years, she is going through the hardships and adversity of imperial life. She must show how real makeup can preserve the strengths and covers the weaknesses!