 During a high speed chase, Celeste Caro woman jumps from the car the police after after. McGarrett arrives as she is dying. Her last words are, "The ways of love." She was also wearing a diamond earring that was part of the crown jewels of another country stolen while in Hawaii. At the Caro woman s home, there is a letter addressed to Dave Barca, housed in a California jail. Barca was in Hawaii a few days earlier, during the time of the robbery. McGarrett goes undercover, posing as another prisoner at the jail in California. Meanwhile, Dan Williams and other officers find specialized X-ray equipment in the now-abandoned car involved in the chase. It turns out the thieves used the X-ray equipment to discover the combination of the safe that housed the jewels. Now, it s up to McGarrett to use Barca as a way to find the jewels.