Twin brothers Daniel and George move from London to the Scottish Highlands, to live with their eccentric and mysterious grandfather on an island in the middle of a Loch. The street-smart boys are amused at his attempts to make them feel at home by telling them a childish story involving time-travelling twins and a magic record player that can bend the sounds of time. They are similarly disdainful of the scavenger hunt he has organized for the following day. Misreading the clues designed to lead them around the island, the twins find themselves inside a tower that have been forbidden to enter. At the towers summit, they discover an old-fashioned record player and a large box of records. Wondering whether there might be some truth in Granddad's bizarre bedtime story, the boys decide to see what the record player can do. Before they can regret their decision, they have twisted the sounds of time, and find themselves aboard a real 17th century pirate ship. Desperately trying to recall the vague memories of what Granddad had mentioned in his bedtime story about how to get back home, Daniel and George now become involved in a real life treasure hunt, the prize being the means to return to Scotland and the present day. They manage to earn the trust of the ship's Captain, 'Terrible' Teddy Theodore, who reveals himself to be the boys' long lost Great Uncle. So begins a race across the oceans to the infamous Island of Norbert's Dog, where they search for treasure in a volcano and engage in pitched battle with the evil pirate, Von Damburger, and his crew of cutthroats. Over and above all this, the boys have to find the way to get back home, and that involves doing a good deed that the mysterious time travelling device will accept. It also involves the twins staying together, and staying alive. Is this going to be the first or the last of their adventures in history?