When Scout and his master Matt arrive in Puerto Rico in the wake of a hurricane, the dog they are fostering, Rosita, runs off into the forest, prompting Scout and Matt to go in after her.

"It's official: Scout is now a K9 in the National Guard. But being a certified hero means Scout has his job cut out for him. He needs to work even harder to protect his country and his human best friend, Matt. When Matt's classmates get trapped in a raging wildfire, Matt knows that only Scout can track them down and bring them back safely. But when Matt's dad, a First Sergeant home on leave, gets wind of their plan, he insists on joining the rescue...