 Five-O investigates multiple cases of missing women tourists. The victims were all recently widowed. It turns out that they are being seduced, swindled and then murdered. Five-O sets up an undercover operation in which a Honolulu Police Department woman officer will serve as bait. Danno suggests, "It stinks." McGarrett s reply: "Nobody asked you." The culprits are a married couple. He seduces the victims, she pretends to be his sister.