For most of the twentieth century, neurologists treated the adult brain as fixed wiring: whatever was damaged by stroke, injury, or disease was assumed to be damaged for good. This film follows the research that overturned that assumption, built around the work of psychiatrist Norman Doidge, who co-writes the film and whose book gives it its title. Patients written off as hopeless cases appear alongside the scientists now documenting how the brain rewires itself after damage, rerouting function through undamaged tissue and forming new neural pathways well into adulthood. The film moves through clinics and labs to show what neuroplasticity looks like in practice: stroke survivors regaining movement, therapies built on repetition and stimulation rather than resignation. Produced by 90th Parallel Productions with Canada's CBC and France's ARTE, it treats the science as recent and still unfolding rather than settled textbook fact, tracking a shift in medicine from managing permanent loss to actively training recovery.