The story follows the life of a legendary singer and actress as she arrives in London to perform sold-out shows during the winter of 1968. Struggling with a turbulent past and facing financial difficulties, she is determined to revive her career and provide for her children. However, her health, both physical and mental, is deteriorating due to years of substance abuse, and she must battle her inner demons while navigating the demands of show business. Relationships with her ex-husbands, her management team, and new romantic interests form a complex web that further complicates her pursuit of stability.

As the pressure mounts, she reflects on her early years in Hollywood, revealing how the industry exploited her talent and contributed to her struggles in adulthood. The film highlights the contrast between her public persona and private hardships, showcasing moments of vulnerability alongside bursts of resilience. Despite the challenges, every performance on stage becomes a poignant reminder of her enduring legacy and exceptional talent. The film delves deeply into the emotional and psychological strains imposed by fame, illustrating the profound impact such pressures can have on an artist's life.