Cannabis and its effects on the brain and body anchor this Montana PBS program, which examines the science behind marijuana's use in treating nausea, pain, epilepsy, and potentially cancer. Patients, doctors, researchers, and skeptics appear in interview, laying out both the documented benefits and the real limitations of medicinal cannabis rather than its politics. The film leans on the work of Dr. Lester Grinspoon, whose book Marihuana Reconsidered debunked several long-standing myths about the drug, using his research as a throughline for what the science does and does not support. The perspective is American throughout, focused on U.S. law and medical practice, though the program notes that marijuana remains illegal in many countries for reasons the film treats as unclear or unscientific. Rather than rehashing the social and legal arguments that usually surround cannabis, the program stays close to clinical evidence: what marijuana does in the body, what conditions respond to it, and where the research runs out.