In a world where a woman's voice is often silenced, a young dreamer fights to tell her own terrifying tale. Elle Fanning stars as Mary Shelley, a brilliant but restless teenager yearning for escape from her conventional life. Her world is irrevocably changed when she meets the charismatic and radical poet Percy Shelley, played by Douglas Booth, embarking on a scandalous love affair that defies societal norms. Their tumultuous relationship is tested further during a fateful stay with the notorious Lord Byron, portrayed by Tom Sturridge, whose challenge to write a ghost story ignites a creative fire within Mary. Surrounded by a circle of free thinkers including her stepsister Claire Clairmont (Bel Powley) and Byron's physician John Polidori (Ben Hardy), Mary channels her personal turmoil—heartbreak, betrayal, and loss—into a groundbreaking work of fiction. Directed by Haifaa Al-Mansour, this biographical drama explores the passionate and painful experiences that inspired a teenage girl to create one of literature's most enduring monsters, Frankenstein, as she struggles for recognition in a man's artistic domain.