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.

It’s been three months since Jesse McDermitt had any time off to go back home to Florida. When two surprise openings on the leave roster open up, he and his friend Rusty Thurman jump on it, and head back to the Keys for some scuba diving. The husband of a local reporter’s friend has nearly been killed. Not once, but four times in less than a month. The reporter is Jesse’s new girlfriend and they become curious. How does a man survive four attempts on his life?

After undergoing many weeks of training during the harsh winter months in the frozen north, Jesse McDermitt and Rusty Thurman are ready for some time off, their last leave period in their first year in the Marine Corps. Only this time, it’s not palm trees and sunny tropical beaches they’ll be unwinding at, but diving in the frigid and treacherous coastal waters off the Outer Banks of North Carolina, the famed Graveyard of the Atlantic, thought to hold great wealth in the cold embrace of her murky depths.