The epic adventure series from best-selling author Anh Do continues! Finally free of the Dray, Noah and Skye race towards Shipwreck Bay –their mum’s last known location. There, they find an old marine park. It looks abandoned, but sea creatures still circle the enclosures ... and the Braxans are on patrol. Danger lurks above ... and below the surface. Can the Dolphin Twins break in and find answers?