Beyond Jupiter, the solar system's moons stop looking like dead rock and start looking like worlds in their own right. This film tours Saturn's Titan, where methane rivers cut through a toxic orange atmosphere, and Enceladus, a small moon venting plumes from a buried ocean that may hold the chemistry for life. It pushes further out to Uranus's Miranda, a moon so gouged and cratered it has been nicknamed the Frankenstein moon, then to Neptune's Triton, which orbits backward against the direction its planet spins, and finally to the paired worlds of Pluto and Charon. Footage and data from the Voyager flybys and the Cassini mission anchor each stop, and the film closes by looking ahead to NASA's Dragonfly mission, set to fly through Titan's skies. Narration frames these moons as a real test of what counts as a planet, arguing that the outer solar system's icy companions may matter more to the search for life than anywhere else in the neighborhood.