When Terry and Barb Dahl open the coffee shop of their dreams on the beach, they are excited to offer a variety of specialty blended coffee drinks. One of these drinks - Mermaid Magic - is so popular that an unscrupulous businessman tries to steal the recipe. While the sisters try to cope with the challenges of running a small business, they must also deal with the machinations of the evil Jack Ingold. In addition, there is always a steady stream of colorful characters floating in and out of the Happy Hippies Java Hut. When the dead body of their nemesis is found - with a cup of Mermaid Magic nearby-Terry and Barb become prime suspects. Within days, another body surfaces with a connection to the coffee shop. However, no matter what happens, the plucky sisters continue to sell their magical brew while trying to figure out who is trying to frame them for these murders.