-Kamekona's cousin is brutally murdered. But the crime is more complicated than it initially appears-- in addition to being a business owner and a pillar of the community, the victim is also a master of lua, the ancient Hawaiian martial art. With some help from his daughter Maggie (guest star Summer Glau), who is also a trained lua fighter, Danny and Steve discover that the victim was kidnapped and forced to compete in a vicious, underground MMA tournament before he was killed.
-Maggie is also kidnapped and forced to compete in the underground fighting ring. She defeats her attacker, moments before Steve and Danny bust the tournament up and arrest the audience.
-Steve hires private investigator Mick Logan (guest star Treat Williams) to keep tabs on his mother. But Mick ends up falling for Doris instead.