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.

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.

A young woman with a gambling problem disappears in ""Gatorworld,"" an alligator park. Shelby's investigation of the case gets her seriously behind on a major biology term paper, grounded by Mike, and within biting distance of some hungry alligators.

An unusual key, which Mike has kept in a secret box, is stolen from the B&B, putting Mike Woo back on the case of a theft he had investigated in San Francisco four years ago. Mike and Shelby head to San Francisco and learn about each other and their individual methods of investigating a crime.

An outbreak of vandalism in Cocoa Beach leads Detective Hineline to suspect Cindi's cousin, Keith, of the crimes. Shelby is caught between her friendship with Keith and the fact that all the evidence points to him.