It's July 1969 and, as the world waits with baited breath for news of the Apollo 11 astronauts, a young boy meets 90-year-old Julius Bedford (Rory Kinnear) who tells an extraordinary story of two men's journey to the Moon, way back in 1909.

As a young man, Bedford chances to meet Professor Cavor (Mark Gatiss), a somewhat unworldly scientist with an amazing invention: Cavorite – anything to which it is applied becomes opaque to the force of gravity. Knowing a miracle when he sees one, and with a keen eye on profit, Bedford encourages Cavor to think big. And so the two men construct a copper and cast-iron sphere which will fly them to the Moon.