Dog is a road trip film, with a screen play by, Reid Carolin that fills most of its time inside of a 1984 Ford Bronco and is filled with dialogue by U.S. Army Ranger Jackson Briggs (Channing Tatum) talking to himself or to the Belgian Malinois military dog Lulu.
Briggs has made an agreement to bring the Dog from Washington State to Nogales, Arizona, and attend the funeral of the soldier LuLu worked with in combat.
There are some comical elements along the trip, but the main theme of the script is the mutual healing of the Dog and Briggs from the effects of their various combat excursions. The words are spoken by Briggs but we see the dog reacting to various elements and events that come across on their way down the West Coast.
On the way the two become involved with other dogs, attractive young women, and even play at Briggs being a blind veteran with a service dog registering in a swank hotel.
The simple script turns as one might expect, and the story does have some warmth as the two characters evolve, it even has some heart, but not enough to provide more than a simple script which probably fits better as a television movie of the week.