In the summer of 2257, the asteroid Wormwood was closing in to strike Earth a glancing blow. Even a glancing blow would be catastrophic. Earth's governments and militaries united to try to shift Wormwood's path. Earth launched every nuclear missile she had and succeeded in changing its path, just enough to miss her surface. In doing so, shards from the asteroid, caused by the nuclear blasts, struck the earth. In those shards were spores that caused a change in all forms of life. Wormwood also changed Earth's magnetic field, affecting weather patterns and causing earthquakes and tidal waves.

The devastation caused society's collapse. Only the strongest survived the Great Dying. In the years that followed, mutations began to appear in animals and people. It was a time of lawlessness, where the only law was the one you could enforce. Cities and larger towns became walled city-forts. Some chose to live outside the city-forts as ranchers, farmers, and scavengers. They enforced the law with violence, and the law of the old west returned. Out of this came the Peacekeepers, modeled after the legendary Texas Rangers. They were empowered by the city-forts to be judge, jury, and executioner. They were a group of hard men: hated, feared, and respected.

This is the story of Price - a human mutation, raised in the frontier wilderness - who becomes a PK Scout.