Magnum's services are once again called upon by Agatha Kimball after she has been contacted by a blackmailer claiming to have some important information about her granddaughter, Amy, but a botched money drop has Magnum thinking they're in far worse trouble than he's been led to believe.

Magnum tries to impress a beautiful fan of Robin's that he befriends by showing her Robin's Nest, only to learn that she is actually a top security expert hired by Robin to test the estate's security after receiving a threat on his life.