Harry Langford needs help when a British royal, who is under his protection, runs away and enlists McGarrett and Danny for the job. When a mysterious videotape shows up at 5-0 Headquarters, Grover, Tani and Junior get to work.
Kono must fight for her life after discovering a notorious criminal's identity, and Adam's ties to his formerly corrupt family business leave Kono feeling concerned.
After a 16-year-old kidnap victim escapes her captors, her parents hire Magnum, who experienced similar trauma as a POW, to find who took her.