World-renowned brain surgeon Henry Marsh spent 40 years saving lives in the operating theatre. Known for his pioneering surgical technique, the awake craniotomy, he reflects on his legacy—not just the patients he saved, but also the mistakes that still haunt him.

Now diagnosed with advanced prostate cancer, as he awaits his own results, he reconnects with families of patients who died in his care, reflecting on the personal cost of his career, including the toll on his marriage. Once seen as a 'surgical superhero', he now advocates for humility and learning from failure.

Featuring unseen archive and emotional encounters, this powerful film follows Henry from the UK to Ukraine, revealing a moving portrait of a man facing his mortality with honesty, reflection, and hope.