When a virus causes a large portion of humanity to become uncontrollably violent, Deacon, his wife Sarah, and his friend Boozer attempt to flee for safety and escape the carnage. However, Sarah is stabbed and critically wounded, forcing Deacon to evacuate her on a National Emergency Response Organization (NERO) helicopter. Due to the helicopter being at capacity, Deacon stays behind with Boozer, intending to reunite with Sarah.
