Magic, Mystery - and Girl Power!When strange holes appear in the sand dunes around their small coastal town, and abalone start disappearing from the reef, Cassie's Coven will need to use science and their swimming lessons to solve the mystery.But as one of their own begins to act strangely, and a deadly spell is uncovered, Cassie discovers that being witches may pose as much danger, as it does fun, to her little coven.