After a mysterious mist engulfs the planet, all of mankind is plagued with various terminal cancers. That is, all but one. As a young boy, john was subjugated to horrible test and monitored for years while scientists searched for a cure for the plague thinking John was the key. Once the science community gave up hope after years of tireless research, John was released into the now decaying world and lives his life as an exile. The Reaping of Planet Earth follows John, the last healthy man among a world of terminally ill, as he lives as shunned from society and falls into an adventure that may finally give him the chance to save his dying world.

The Reaping of Planet Earth is a marriage of the post-apocalyptic and alien invasion genres.