"Cagefighter" revolves around mixed martial arts champion Reiss (Josh Herdman) who unexpectedly loses a heavily promoted match. A downward spiral sends him to the brink of losing his wife (Michelle Ryan) and his best friend and agent (Jason Maza). Deemed erratic and out of control, he alienates his long-time trainer (Michael Jai White) and the biggest MMA promoter in the business (Gina Gershon). He must dig deep to find a path back to victory.