In Victorian London, the unorthodox and disfigured surgeon Dr. Godwin Baxter performs a radical experiment, reviving the drowned body of a young pregnant woman by transplanting the brain of her unborn fetus into her skull. Named Bella Baxter, she initially possesses the motor skills and vocabulary of an infant. As her brain rapidly develops, Godwin hires his timid
medical student, Max McCandless, to monitor and document her erratic, fascinating progress. Fascinated by her uninhibited nature and ravenous intellect, Max falls in love and proposes marriage, hoping to settle down in Godwin's cavernous, bizarre estate.However, Bella’s burgeoning curiosity and awakening sexuality clash with the confines of her sheltered existence. When the hedonistic and slick lawyer Duncan Wedderburn visits the house, he seduces Bella with promises of worldly adventure. Intrigued by the prospect of
sexual pleasure and foreign lands, Bella abandons Max and elopes with Duncan on a whirlwind, globe-trotting escapade.Their journey takes them to Lisbon, Alexandria, and Paris. In Lisbon, Bella discovers the dizzying thrills of dance, food, and uninhibited sex. As they travel further, Bella’s worldview expands dramatically. In Alexandria, she is horrified by the stark realities of human poverty and suffering, prompting her to impulsively give away all of Duncan’s wealth to destitute strangers. Terrified by her evolving independence, emotional maturity, and refusal to submit to his control, Duncan becomes increasingly unhinged, controlling, and destitute.Stranded in Paris after Duncan abandons her in a fit of rage, Bella pragmatically enters a high-end brothel to survive. Far from being degraded, she embraces the work with intellectual detachment and philosophical curiosity, finding profound empowerment and emotional connection with her fellow sex workers and clients. She reads socialist literature and debates philosophy, eventually earning enough money to leave the establishment behind.Financially independent and worldly, Bella returns to London upon learning that Godwin is dying. Reunited with Max and a dying Godwin, she confronts her past and makes peace with her surreal origins. She reconciles with Max, though she refuses traditional marital subjugation, choosing instead to pursue a career in medicine. Following Godwin’s peaceful death, Bella inherits his estate, setting up her own medical practice with Max, her former fiancé-turned-colleague, and living out her days as a fiercely independent, educated, and liberated woman who is entirely the author of her own destiny.