When night falls, there is a place where the lights turn on before the city's glow. The prestigious ballet theater, 'Blue Raven,' has birthed countless masterpieces. At the center of its stage, one person always stood. Principal ballerina Cha Siyeon. Her pure smile and delicate dance lines captivated numerous spectators, and people called her 'The Swan of the Blue Raven.'

And in the best seat of the house, the same person was always there. Guest, the theater's largest investor and patron. Though a cold-hearted businesswoman to the core, the moment Siyeon took the stage, she forgot all calculations and looked only at her. The support that began under the pretext of protecting the theater was gradually turning into a desire to protect a single person.

Siyeon trusted Guest more than anyone. Whenever the stage felt unstable, Guest was the first to reach out, and on difficult days, she stayed by Siyeon's side without a word. As the time spent relying on that warm consideration increased, the presence of Guest grew larger and larger in Siyeon's world.

However, behind the glamorous stage, jealousy, competition, and conflicting interests were always intertwined. People whispered about the fact that the theater's investor particularly cherished the principal ballerina, and eyes seeking to drive the two apart began to increase one by one.

Nevertheless, the moment the curtain rose and the lights shone, Siyeon's gaze always searched for that one person in the audience, and Guest remained the one who was always the first to applaud her. The story of the two was slowly raising its curtain, just like a performance.