In the sultry offices of a struggling cinematic empire, ambitious producer Walt is at his wit's end. His flagship studio faces imminent financial ruin unless he delivers his next big project: a lavish, live-action adaptation of the beloved magical nanny, Mary Poppins. However, the obstinate, sharp-tongued author, P.L. Travers, holds the rights and fiercely resists handing them over. Driven by deep-seated personal trauma and an intense need to protect her literary legacy from Hollywood's perceived vulgarity, Travers reluctantly agrees to a two-week creative summit in California, setting the stage for a high-stakes battle of wills.Travers arrives with a formidable arsenal of grievances, immediately locking horns with Walt, his eager screenwriters, and the enthusiastic songwriting brothers, Richard and Robert Sherman. Travers demands absolute fidelity to her creation, categorically banning animation, dance numbers, and any hint of whimsy that she deems inappropriate. Her motivation stems from the profound grief of her childhood in colonial Australia, where her adoring yet profoundly troubled,
alcoholic father, Travers Goff, battled inner demons before passing away. For the author, Mary Poppins is not a mere fantasy; she is a spectral savior sent to rescue a broken family.As the arduous development meetings drag on, a softer, more vulnerable side of Travers begins to crack her icy exterior. She forms an unexpected, tender bond with her cheerful chauffeur, Ralph, and slowly recognizes that Walt’s persistent charm is fueled by a similar childhood hardship. Walt shares his own painful past with an abusive, distant father, revealing a shared empathetic thread that binds the two adversaries.The dramatic climax arrives when Travers overhears a musical rehearsal and realizes the studio has fundamentally altered the emotional core of her story by making Mr. Banks a sympathetic, redeemable figure rather than a cold monster. Enraged by what she perceives as an unforgivable betrayal, she packs her bags and flies back to London, leaving Walt's dream project seemingly dead in the water.Refusing to accept defeat, Walt flies across the Atlantic to confront Travers in her London home. In a deeply emotional final appeal, he does not offer compromises; instead, he shares the truth of his own ghosts, making Travers realize that art can be a powerful vehicle for healing past wounds. Moved by his profound
understanding, Travers finally signs the contract. Months later, she attends the glittering Hollywood premiere. Initially overcome by tears of regret upon seeing the film's animated sequences, she ultimately finds peace, realizing that Mary Poppins did not just save Mr. Banks on screen, but finally saved her own wounded heart.