Kate Humble and physicist Dr Helen Czerski trace the invisible mechanics that link Earth's orbit around the Sun to the weather on its surface. The pair travel to locations chosen to make an abstract idea physical, showing how the planet's tilt and elliptical path set up the seasons, drive ocean currents, and shape storm systems. Czerski uses simple demonstrations, spinning objects, model orbits, and everyday physics, to explain why a hundred-thousand-kilometre-an-hour journey through space feels like nothing from the ground, while Humble supplies the on-location curiosity, asking the questions a non-scientist would ask. The film moves between studio-style explanation and field footage, connecting orbital mechanics to phenomena viewers already recognize: shifting daylight hours, monsoon patterns, and the timing of winter and summer. Rather than treating orbit as pure astronomy, the film keeps returning to its practical consequences, building toward a picture of Earth's climate as a direct product of its path through space. It's a straightforward, footage-and-demonstration explainer aimed at making planetary motion tangible.