Sailing, scuba diving, and beautiful weather. It seems like a great impromptu vacation for thirteen-year-old Will and his older cousin Harley. But the vacation turns into a battle with crooks who are searching for a centuries-old treasure. A client of the family sail-making business in Lunenburg, Nova Scotia has asked the cousins to deliver his boat to Bermuda. Little do they know that the delivery job is not what it seems, and when they get to Bermuda they find themselves being forced at gunpoint to dive for a US Civil War-era blockade runner that is said to have sunk laden with gold.As they try to foil the plans of the treasure-seekers, Will and Harley learn about the shipwreck, the Civil War blockades, and a connection to the Keith brewing family of Nova Scotia.