Shortly after his mother is killed in a car accident, Lucas returns home to Havelock to live with his dad. At his school, Lucas stumbles upon three boys recruiting another young boy to carry out a school shooting. Lucas comes away from the encounter carrying a pistol. Hidden in the butt of the gun is a flash drive containing the directives to terrorists to infiltrate Wounded Arrow, where 200 Military service dogs have been returned from the war overseas. Their goal is to place a chemical agent in the ventilators of the compound, eliminating these retired service dogs awaiting adoption as a reward for the service they provided to the US.