The human brain shares roughly 96% of its genetic code with a chimpanzee's, and this film builds its case around that remaining 4%, concentrated in the neocortex, as the hinge point for everything that separates human cognition from other primates. Neuroscientists and researchers walk through what that expanded neocortex actually buys us: expanded capacity for language, learning, and abstract reasoning. Animation sequences break down neurons, synapses, and neurotransmitter signaling for viewers with no science background, paired with interviews explaining current thinking on where consciousness comes from and why it remains unresolved despite decades of brain imaging and mapping work. The film moves from evolutionary history into open questions neuroscience has not settled, including how electrical and chemical activity in neural tissue produces subjective experience at all. It treats that gap between measurable brain activity and felt consciousness as the film's central unanswered problem rather than pretending to close it.