Natalie grew up learning how to fight as her first instinct. Her parents both joined in the Unit Nation as the military unit to protect the main government controlling the world. One day, Natalie has learned to use these instincts for real, changing no only her life, but her city all around her. Becoming part of the Unit Nation military unit may have been easy, but will it be easy to get through the city? As days go by from the first infection, truths spill out, showing the full power of the main government versus the Unit Nation Cooperation.