From the back of the book:
Battle Royale
Prepare for the fight of your life! Martial artists, magic users, and misfits from around the globe meet in the world’s greatest fighting competition: the Ruby Phoenix Tournament. Challengers can gain valuable rewards and enhanced reputations, or even obtain access to special opportunities and amazing new powers. But to reach the tournament’s final bout and claim their place as grand champions, members of the party will need to defeat sinister rivals, survive perilous challenges, and overcome incredible odds. After all, only one team can win the grand prize – a priceless treasure from the vault of the Ruby Phoenix herself, the sorcerer Hao Jin! The Fists of the Ruby Phoenix Adventure Path is a complete campaign for 11th to 20th level characters.