Magnum is despondent over his loss of his wife Michelle, his father, Mac McReynolds and now Diane Dupres. While driving in Honolulu the next day, he sees a man who could be an identical twin for Mac McReynolds.
Robin Masters asks Magnum to track down an embezzler working in a local bank. Meanwhile, Higgins is being blackmailed and since Magnum is busy, he recruits Luther Gillis to help him find the blackmailer.
A Robin Masters' sponsored jewelry design competition is being held at the estate with over $170 million worth of jewelry on display and the insurance company sends Krista Villeroch to check on the estate's security.