"Mae Ying" tells a romantic love story. The beautiful and noble eldest daughter of the prince fell in love with a civilian singer of vastly different social status. Despite her family's opposition, the princess resolutely pursued her own happiness. However, in the machinations of her stepmother, her lover lost his life. The princess cut her hair, left the palace, and restarted her life under another identity. Living an ordinary life, the princess met the handsome and arrogant "playboy" male lead. The male lead gradually fell in love with this pretty country girl, only to discover that she was that "unfaithful" princess. Is it love or hatred, and how should all the grudges be resolved?