In a prestigious opera house in Milan, the young and talented soprano Betty is preparing for her debut in a production of "Macbeth." While she is excited about the opportunity, she cannot anticipate the horror that awaits her. After receiving a mysterious threat, her life turns into a terrifying landscape where the line between fiction and reality becomes alarmingly blurred.
What begins as a simple rehearsal transforms into a nightmare when a killer emulates the bloodiest scenes of the play, abducting people close to Betty and sowing panic in the theater. The pressure intensifies as the director and the rest of the cast struggle to keep the production afloat while a series of macabre events test Betty's sanity. With each performance, the atmosphere of tension and horror escalates; every time she steps onto the stage, fear lurks, threatening not only her life but also her sanity.
As the plot unfolds, Betty decides to take control and uncover the identity of the killer, risking everything she has worked for. In a deadly game of artistic catharsis and psychological terror, the singer is forced to confront her deepest fears: not only to survive but to discover the power of her own voice amidst the chaos.