The world is a scary place now. If you had of asked us when we started how this would end up, we would have said a better world. After all, that was why we created the nanobots in the first place- the heal, correct and make better. We made them self sufficient, capable of surviving, healing and reproducing on their own. But we lost control. They didn't know when to stop healing- the result was super-human, completely instinctual creatures with no thought process other than to survive. The perfect race, so to say. Quickly, the nanobots overtook the main lab, where the controlling signals were sent out. They realized soon after that they couldn't live long having to overtake every person on the planet, however, so they adapted. If you are so much as touched by any "healed" human, you're changed. The process is slow and painful, and by now it's spread across half the planet. Our only hope is to get back to base, and hope we can stop it. Welcome to Hell.