Five-0 is first on the scene when a pirate attack turns an afternoon pleasure cruise into a kidnap-and-ransom nightmare for a group of wealthy spring breakers.

Five-0 must unravel the mystery of why a mild-mannered sci-fi fan wearing a cape was given truth serum before being tossed out of a 21st-story window. Meanwhile, McGarrett gets an unexpected visit from a CIA agent who shares his personal interest in tracking down the Yakuza who had his parents killed.