The story unfolds in the early 21st century, and the main characters are three old acquaintances – Doc, Sal and Muller who served together in the Vietnam War. Since then, many years have passed and each of them has begun their lives, and their friendship has remained just a memory. But one day Doc appears who finds his old friends asking them to go with him to the funeral of his son who died in Iraq and provide him with a proper burial with military honors. But when they arrive at the funeral, Doc decides to refuse his child to be buried away from home and decides to take the coffin and, with the help of his friends, to take him back home. This will turn into a seemingly sad journey, but a series of unexpected events will turn the movie The Last Flag Flying into a memorable trip for old friends, which will be full of laughter and joy.