The year is 1862. The Skink, a Confederate ship, is attacked by Union forces and sinks off the Alabama coast in the Gulf of Mexico. Although the ship was rumored to be carrying newly minted gold coins, no trace of the wreck and not even a single piece of Confederate gold is ever found. Fast forward to 1973. Mike is prepared for another routine summer in Pensacola with his marine biologist father. But plans suddenly change and Mike finds himself on Shipwreck Island near the site where the Skink went down and right in the middle of a century-old mystery! Mike and his new friend Kyle are intrigued by a salvage ship anchored just offshore. Some say it was brought in by fortune hunters searching for the long-lost Confederate ship and its treasure. But when the boys scale a fence at the fort on the island and explore a section closed off to the public, they realize that the fortune hunters may be looking in the wrong place. There in the sand-covered floor of an abandoned chamber they spot something shiny: an old double eagle gold coin. Mike and Kyle agree to keep their discovery a secret and start their own investigation into the shipwreck and the missing gold.

A coin. A friendship. A fast car. And a girl with a secret... Author Sneed B. Collard III puts them together to create the heart-pounding sequel to Double Eagle. Two summers after Mike and Kyle uncovered a pair of priceless $20 gold pieces in a Civil War fort in Alabama, Mike is astounded to find Kyle show up on his doorstep in souped-up 1957 Bel Air. Mike hasn't heard from his friend in two years, but when Kyle invites him to ride up to Birmingham to see Kyle's sister, Mike doesn't hesitate. What Mike doesn't realize is that Kyle isn't going to see his sister. He's going to rescue her. For Kyle and Annie to escape somewhere safe, however, they're going to need cash and lots of it. When Mike mentions a mysterious silver dollar made in 1964, it launches the trio on a cross-country thrill ride and a new coin quest-a quest that could save Kyle's and Annie's lives.