Synthetic biology promises to take nature apart at the genetic level and rebuild it to order, and this film surveys how far that promise has already gone. The clearest example on screen is the so-called spider goat, an animal engineered to produce milk containing spider silk proteins, which researchers spin into fiber strong enough to rival steel by weight. Elsewhere the film tracks synthetic organisms bred to produce bio-diesel, effectively turning bacteria into miniature refineries, and researchers working on biological machines designed to be introduced into the brain to influence mood and emotion. Scientists and bioengineers lay out the mechanics of each project, while the film keeps circling back to the harder question underneath the demonstrations: who decides what gets redesigned, and what happens once organisms are built rather than found. The tone stays closer to inquiry than alarm, but the ethical stakes are treated as inseparable from the science, since a technology that can rewrite a goat's genome or a brain's chemistry does not stay confined to the lab for long.