Many years after the events of Mad Max Beyond Thunderdome, Max Rockatansky is still wandering the wasteland that was once Australia. He's somehow still a young man, now played by Tom Hardy instead of Mel Gibson. He's captured by the War Boys, followers of Immortan Joe (Hugh Keays-Byrne), and taken to the Citadel. It's a big day there, as Imperator Furiosa (Charlize Theron) prepares to set off on a trip to Gas Town to deliver water and bring back "guzzaline." Unbeknownst to Joe and the War Boys, however, Furiosa has snuck out Joe's "five wives" (Rosie Huntington-Whitely, Abbey Lee, Zoe Kravitz, Riley Keough, and Courtney Eaton), the four healthy women he's captured to use as breeding stock.
Meanwhile, Max is being used as a blood donor for one of the sickly War Boys, Nux (Nicholas Hoult). When Immortan Joe realizes Furiosa has stolen the brides and the War Boys ride out to stop her, Max is attached to Nux's car so the transfusion can continue. He soon escapes and allies with Furiosa, who is attempting to take the brides to the Green Place where she grew up. Unfortunately, it's long gone, and all that remains of her people is a small group of old ladies on motorcycles and one warrior woman (Megan Gale). With the help of Max and Nux, the women destroy Immortan Joe's forces and return to the Citadel, where they take over and give water to the people from whom Joe had been hoarding it away.
Expecting Max to ride the elevator to the citadel along with her and the brides, Furiosa is surprised to look down and see Max disappearing into the crowd. Once again, the Road Warrior wanders off into the realm of legend.