Is it possible to know how much time you have left in your life? Through a series of short stories we explore the mysteries of time including how we even know what time it is. We visit one of the most famous clocks in the world, Big Ben, to see how they keep it running, and we meet a scientist who believes he is on the verge of being able to stop time. Ultimately, we meet inventors who developed a device that supposedly reveals how much time you have left.