When Phoebe flew to visit her cousins in the States, she figured that it would be an adventure just leaving her home of Australia for the first time. She could never have guessed that when they went exploring the islands near Charleston joking about finding pirate treasure that they would actually find a mysterious chest. With a design of mermaids and dolphins on the outside, the treasure within draws the girls to take a bracelet for each of them. When the girls begin changing into mermaids after getting wet the next day, their lives become a need to keep the secret and find a way to end the curse before anyone else can find out. Can Phoebe and her friends discover a cure to the mermaid’s curse before the wrong people find out?