Cagefighter follows mixed martial arts champion Reiss (Herdman) who unexpectedly loses a heavily promoted match to Randy Stone, a WWE star who is making his crossover debut in the MM嗄 fighting world.Cagefighter follows mixed martial arts champion Reiss (Herdman) who unexpectedly loses a heavily promoted match to Randy Stone, a WWE star who is making his crossover debut in the MM嗄 fighting world.