Something ancient and powerful lies beneath the surface of an idyllic and much-loved holiday island off the southern coast of Australia. A supernatural force to be reckoned with. This fourth novel in the series sees events on the Island come to a dramatic conclusion. The Island Deep is stirring angrily and lives are lost as those who seek to steal its power become more desperate and create further chaos. Pursued by their evil enemies, Chris and Leandra race across the island to seek help from the ancient entity. But when they finally make contact, things aren't quite what they expected. Phillip Island will never be the same...