Plot: In post-apocolyptic Australia, Imperator Furiosa (Charlize Theron) takes her battle wagon off raiding duty and into the mountains looking for a utopia called Green Place. Meanwhile, Max (Tom Hardy) is captured by warlord Immortan Joe (Hugh Keays-Byrne), who needs to catch Furiosa. The bad guys tie Max to the front of a jeep to use for replacement blood and as human shield. Because the enemy of my enemy is my friend, Max ends up working with Furiosa, who is secretly smuggling Immortan Joe's young wives to the Green Place.
It is a simple story - understandable without a lot of dialog because fleeing girls chased by bad guys is an archetype, that is, oppressed women are trying to escape to a feminist utopia. It is more feminist than any action movie that I can think of, more in a league with Frozen. As readers of Depth of Processing know, 21st Century women characters rescue themselves without need of male heroes. Is the feminist message sincere or just pandering to get an audience? Answer: This is a Hollywood movie; the best you can expect is both.
Max is really a side kick for Furiosa, who is the primary hero. It is unusual to have a side kick in the title role.