As coordinated attacks by animals against humans increase and escalate, young biologist Jackson Oz and ecologist Chloe Tousignant warn world leaders that soon there will be nowhere left for humans. All over the world, brutal attacks are crippling entire cities. Oz watches the escalating events with an increasing sense of dread. When he witnesses a coordinated lion ambush in Africa, the enormity of the violence to come becomes terrifyingly clear....

With the planet still under attack by vicious animals, humans begin evolving into a barbaric species that has the power to save civilization--or destroy it.