 While Chin Ho Kelly investigates a protection racket run by the Hawaiian "kumu" mob, three mob members recognize him as being from Five-O. The deputy leader of the kumu, who is trying to undermine his boss, murders Chin and dumps him right in front of the Iolani Palace. A grief-stricken and enraged McGarrett confronts the kumu boss, who didn t know about the hit, and threatens a statewide crackdown. Meanwhile, the underboss gets busy eliminating possible witnesses to the hit. When confronted by his boss, he finally admits to the murder and pretends to leave the country to take off the heat -- but instead orders a hit on McGarrett himself.