Ken Min lives in shame and remorse. Once a great fighter, Ken lost his desire for violence after failing to stop his good friend, Tokyo Joe, from killing a young husband and wife, leaving their infant son orphaned. After his friend goes to jail for the crime, Ken seeks redemption by teaching mixed martial arts at a community youth center. After reconnecting with the orphaned boy years later, Ken finds out that his murderous friend made parole and is being released from prison. When he discovers that these two events are not a coincidence, Ken must choose to break his promise to never fight again or face the past to save his future.