Once again, sisters Kathy Lee Day and Erica Daniels are called to the little fishing village of Capwater, Florida by their new found cousin and friend, wealthy real estate investment broker, Darla Starr, whom they solved the mystery of why she was kidnapped two years ago.
Now, Darla is settled into her seaside cottage in Capwater, Florida engaged to Bill Thomas, former police officer turned FBI agent when she discovers what she believes to be a metal chest in the bay right off of her beachfront property.
Darla is stumped by the mysterious chest after researching the property that she inherited from her adoptive parents so she decides to call in her mystery solving cousins Kathy and Erica to help her solve the mystery.
When Kathy and Erica arrive at Darla's seaside cottage they are astounded when they discover that not only they have been called for what they thought was a beach get-a-way week, but the other set of crime solving sisters, Macey Lee and Betsy Marie from Ohio are awaiting their arrival at the cottage.
What kind of mystery awaits the two sets of crime solving sisters as they get involved in helping Darla try to rescue the metal chest in the bay and research the area of the beach from old property plats.
They are even more puzzled when Troy Masters, FBI agent, Bill Thomas, FBI agent and Greg Pettis, former FBI agent show up on the scene.
Darla told them this was going to be a reunion, but they had no idea that Macey Lee and Betsy would be abducted and left to die in an old underground lighthouse base on Brad Island, southeast of Darla's cottage across the bay.
Entering the scene is Angie Peterson, the waitress at Packy's Shack, their favorite coffee and sandwich shop, who is looking for her lost inheritance left by her grandparents who disappeared.
Angie has been searching for the property for years to no avail when she meets a man who cons her out of the deed her grandparents gave her to their beach property. She also confided in him about the jewels and old coins that were left to her by supposedly. No one knows his identity as Angie has now developed amnesia when Tropical Storm Alberto is bearing down on them.
Is he the man on Brad Island that has abducted Macey Lee and Betsy, along with tying up Joe, the innkeeper at the Sea Gull Inn after he abducted Ned, the cook?
When Darla, Bill, Troy, Erica, Kathy and Greg along with Sam, Kathy's German Shepherd dog venture out into the tropical storm to Brad Island in Darla's cabin cruiser, searching for the sisters, it is now believed they are dead along with Macey Lee and Betsy. Will there be a reunion at the beach or will eight bodies wash ashore?