The Sixth Extinction Series is an apocalyptic tale about a pandemic that sweeps the globe, decimating the human race, leaving humanity struggling to survive. Within three weeks, everything has changed. Social structure has collapsed. The police are non-existent, and the army concentrates on the cities. Gangs of yobs rule the streets.

Red is a nineteen-year-old who struggles to put food on the table for her younger sister, Jasmine, after her mother passed away from cancer, and her stepfather turned to drink to cope. Red's life turns upside-down when she returns from a double shift to find her stepfather has done something inconceivable. Red reacts in the heat of the moment, and then runs away to hide in the local woods, while trying to come to turns with what happened and what she has become.

While hiding from the authorities, and grieving, a virus ravishes the world. By the time she walks out of the woods, to hand herself in, life, as she knows it has changed forever, and not in the way she expected. The world is in chaos, and it is everyone for themselves.

Red has to put her grieving aside; it is now fight or die.