Lili is a princess who dreams of participating in a singing contest, however, she fears for the image of the royal family. Didi and Arthur help Lili, who hides her identity. However, Lili's cousin Lucélia wants to destroy Lili's plans.

Daughter of King Frederico and the Queen Eddys, Lili is a princess who hides her musical gift from everyone because she always has to devote herself to etiquette lessons. Singing hidden in the palace gardens, Lili's voice is recognized by the knight Didi. Didi makes a plan and decides to help her participate in the real music contest together with the storyteller Arthur: the young woman starts to sing with her face hidden by a veil. Everyone is amazed and wants to know who the masked singer is. However, Lili's success has an enemy: Lucélia, Lili's cousin, wants to win the competition at all costs, and doesn't hesitate to do everything to get her out of her way with the help of her mother, Duchess Yvana . However, Yvana was bewitched in her youth to have an evil heart and only Didi can break the spell. To make matters worse, Lili and Lucélia are also vying for young Galante's heart.—Iago