When Julian, Dick, and Anne are sent to spend their summer holidays at the coastal village of Kirrin, they have no idea what incredible adventures await them. They are introduced to their fierce, tomboyish cousin George—who insists on never being called Georgina—and her incredibly loyal, lovable dog, Timmy. At first, George wants nothing to do with her cousins, but the five quickly bond and become completely inseparable as they explore the rugged, beautiful coastline.

The real excitement begins when a massive, terrifying storm churns up the ocean and lifts an ancient, long-forgotten shipwreck straight out of the depths, washing it onto the jagged rocks of Kirrin Island! While exploring the eerie, rotting hull of the ship, the children discover a mysterious locked box containing an actual treasure map. But they aren't the only ones looking for the lost gold. Soon, the Famous Five are locked in a dangerous, heart-pounding race against ruthless treasure hunters. Packed with secret dungeons, midnight escapes, and true bravery, this is the thrilling first adventure of the most famous children's club in the world!