Ivy Nolan, a theater worker aspiring to be an actress, auditions for and lands the lead role in a major production. Idol actress Sylvie Kane, under the arrangement of her husband Julian, undergoes intensive, intensive training and is even given the name Ivy Monroe.
During their time together, a forbidden romance blossoms between them. Sylvie is trapped in a stifling marriage, while Ivy refuses to remain merely a mistress. Their affair is exposed by Dylan, and Sylvie, pressured by her husband, chooses to back down. Disappointed, Ivy leaves.
After losing Ivy, Sylvie has a sudden realization. She breaks up with her husband and writes, directs, and stars in "Love Under the Mask," revealing her true feelings. On the night of the premiere, Ivy appears in the audience, and the two gaze at each other from afar, marking a turning point in their relationship.
