When a gold coin is stolen from a local dive shop, Shelby, Cindi and Noah look for the missing treasure.

A dolphin at a marine lab in Cocoa Beach is missing. The police in town are distracted by smuggling activity in the area. Shelby takes on a mystery the adults ignore and ends up solving both cases.

Jack Berg, champion surfer and local celebrity, is accused of drugging a rival. Shelby thinks he's been framed--despite strong evidence against him and the opinions of most of the adults in town.

A famous astronaut is kidnapped from Shelby's grandfather's B&B. In tracking him down, Shelby finds out more than she wants to know about the human side of an American hero.

When Shelby, Noah and Cindi get stuck with counterfeit tickets for a concert in Cocoa Beach, Shelby wants to find out who planted the fake tickets--and why.

What started as an investigation into counterfeit tickets becomes more serious when the kid who sold Shelby the tickets disappears.