Penn, one of the most successful and feared fighters in the Ultimate Fighting Championship, tells his story-- the story of a kid from Hawaii who loved to fight.

The first part -- What I learned -- Unexpected changes -- Ralph and Dave -- New beginnings -- Unfinished business -- Moving forward -- Entering the octagon -- Three-fight deal -- Up, then down -- Just scrap -- Title defense -- Full circle -- Opportunity awaits -- The real champ -- On an island -- More than words.