Max, a Malinois dog used to help United States Marine Corps in Afghanistan, is handled by Kyle Wincott (Robbie Amell) (Marine MWD). Kyle is questioned when weapons seized by his squad go missing. Realizing his friend Tyler Harne (Luke Kleintank) is among those involved with the shady dealings, he warns Tyler that he cannot cover for him. The two then go into the battlefield with their squad, with Max on point. While advancing on a suicide bomber, Max is injured by an explosion. In the ensuing gunfight, Kyle is shot and killed.
Max is assigned to the White House while Charlie, the United States Secret Service dog, is on maternity leave. He meets TJ, a 12-year-old boy, who is the President’s son. Due to his father’s high profile, he is trying hard to fit in and lead a normal life. During a state visit by the Russian President and his daughter, Alexandra (Alex) (Francesca Capaldi), TJ is asked to accompany her, during their stay. TJ befriends Alex, but when they sneak out of the white house in an attempt to find a party thrown by some of TJ's new friends at school, two masked villains try to kidnap TJ and Alex.