Without some damn war to fight, then the warrior may as well be dead, Stallion!
-Apollo Creed, Rocky IV

No rules, just right, MMA is the Outback Steakhouse of combat sports. Mixed Martial Arts has gained some legitimacy, it used to be a joke, now it's just less of one.

Our story takes place in Pittsburgh. Brothers, Brendan (Edgerton) and Tommy (Hardy), are about to duke it out in the most epic of battles, the battle of life.

...And a brother is born for adversity.
Proverbs 17:17

Brenden (Edgerton, used to fight for a living, but he gave that up for the sake of his family. It's a tough choice we all face eventually: should I teach high school physics or fight in the octagon?