Piper is sad about leaving her home and friends behind when her father, a Navy aircraft mechanic, is transferred yet again, but with help from her often-annoying sisters and a surprise from their parents, she finds happiness in their new home in Pensacola, Florida.

When Zack goes to Florida to visit Mel & Shirley's Wonderful World of Dolphins, he is surprised to discover that he can understand and speak to dolphins, which enables him to solve a kidnapping.