The average person lives a Lifespan from around 0-80 sequentially. Spanners don't. Some live their lives in reverse. Some come alive for a single day every ten years. Some like our hero, Dr. Adam Parr - are immortal.
In a future world mankind is about to be wiped out by a super virus. As people hide underground, their only hope is a meteorite that has fallen to earth which may contain a cure. Only one thing stands in their way from retrieving the crystal: The infected topsiders.
