While Five-0 investigates the murder of a bounty hunter after he apprehended a fugitive hiding out in Hawaii, Rachel (guest star Claire van der Boom) reveals a long-held secret to Danny (Scott Caan) that has serious ramifications. Also, as Kono's (Grace Park) wedding nears, Chin (Daniel Dae Kim) voices his concerns to McGarrett (Alex O'Loughlin) that Adam (guest star Ian Anthony Dale) is still working with the Yakuza.