Randall Lee is back! "I need you to do... whatever it is that you do, Randall. Help him. Please." Just back from a relaxing vacation, acupuncturist and Tai Chi master Randall Lee returns to find his friend, Detective John Knox, in critical condition following a bizarre and random attack by a seemingly unstoppable assailant. Against the wishes of the police (and, perhaps more importantly, against the wishes of his girlfriend), Randall begins to look into the case... but in vowing to help Knox, Lee must descend into a world of organized crime, underground fighting tournaments, mysterious assassins, and his own shadowy past to discover the truth.