Family adventure drama following the journey of a US Marines dog. War dog Max is suffering from post-traumatic stress disorder after serving in Afghanistan where he was terrified by a nearby bomb explosion and witnessed his handler Kyle (Robbie Amell) being shot and killed by corrupt soldier Tyler (Luke Kleintank). To prevent him from being put down Max is adopted by Kyle's family and his younger brother, Justin (Josh Wiggins), who at first seems disinterested, begins to develop a close bond with the dog. When he discovers that Tyler is involved in some dodgy dealings over stolen weapons and that his dad Ray (Thomas Haden Church) is in danger Justin, with the help of his friends Chuy (Dejon LaQuake) and Carmen (Mia Xitlali) and the faithful Max, goes on a mission to save the day.