Fight or flight

Zack wasn't much for girls but he liked one who's name was shelbie. They had dated before but things have changed. She's asked zack to change but when he steps in the underground mma arena that his older brother Blake runs since he's never lost. Zack loses himself finally through the pain of love he tries to change but in mma there are two things that never change: first is when step in the arena it's fight or flight and secondly you can never walk away. The only way zack can leave Is he must do the impossible and beat his brother.