It's easy to become invisible in the Florida Keys. Mac Travis was doing his best to keep a low profile: diving, fishing, and enough salvage work to pay his bills. It's a good life until he discovers something while spearfishing that could change the pristine Keys forever.

When collegiate baseball phenom Chase Fulton suffers a freak injury on the field that shatters his dreams of becoming a Major League catcher, his future looks bleak until he’s recruited into quasi-governmental covert operations, where his training as an assassin and covert intelligence operative launches him into a world fraught with danger, intrigue, and unexpected passion.

Danger lurks in the sleepy little town of Marathon, in the middle of the Florida Keys, as well as in the swamps of the Everglades. But danger doesn't expect to run into a man like Jesse. A man who will not only respond swiftly in facing it, but with a vengeance unexpected.

Six months out of high school and just days after finishing Marine boot camp, Jesse McDermitt is finally ready to unwind and have a little fun when he goes home on leave. But everything Jesse remembers—his friends, his family, the sparkling beaches and familiar waters of the Caloosahatchee River and Pine Island Sound, even his faithful Lab, Molly, have all changed.

In 1521, the Aztec treasure, considered to be the greatest ever assembled, vanished from the capitol city of Tenochtitlan. Almost five centuries later, former Navy SEAL Logan Dodge finds a mysterious gold coin off of a secret ledge in the Florida Keys. When he learns the origin of the coin, he goes on a mission to find and secure the treasure for the people of Mexico. But he’s not the only one who’s caught the scent of gold. A notorious Mexican drug cartel known as Black Venom is right on his heels and will stop at nothing to take the treasure for themselves.