Magnum's temporary role as Head of Security at a hotel leads him to investigate the death of hotel guest Georgia Preston. Learning that she was a reporter, he follows the story she was working on, which involves a mob boss.
Rick is puzzled at his uncle Francis "Icepick"'s early release from prison.
Tropes:
- Bodily Fluid Blacklight Reveal: When Magnum finds the secret bungalow, a sweep of the blacklight reveals a large amount of blood was recently cleaned up there.
- Crossover:
- Kimee Balmilero returns as Dr. Noelani Cunha.
- Larry Manetti, who played Rick in the original series, appears in his Hawaii Five-0 role as Nicky 'The Kid' DeMarco.
- I Want You to Meet an Old Friend of Mine: Catherine Dent, who plays Georgia Preston, and Tim Kang appeared together in The Mentalist.
- Ms. Fanservice: Higgins in a bikini.
- Prohibited Hero Saves the Day: Once again, Magnum and Higgins ignore Katsumoto's instructions to stay out of the case.Katsumoto: Stay here.
Magnum: You don't think we're gonna do that, do you?
Higgins: A for effort, though. - Secretly Dying: Rick's uncle "Icepick" was released from prison early due to a terminal diagnosis.
- Secret Room: As the title suggests. The room is a secret bungalow hidden in the hotel grounds where guests can discreetly check in for the purpose of conducting affairs. Following Georgia Preston's footsteps, Magnum finds it and realises it's the site of a murder
- Sleeping with the Boss's Wife: An especially stupid idea when that boss is a crime lord, but that's what DeMarco was doing. They used to meet in the hotel's well-hidden secret bungalow.
- They Know Too Much: Georgia Preston was thrown from a hotel balcony because a story she was working on led her to discover a murder.
