It's easy to become invisible in the Florida Keys. Mac Travis is laying low: Fishing, Diving and doing enough salvage work to pay his bills until three fishermen trolling the Gulf Stream discover a square grouper. Besides the drugs, the package contains a secret that changes their lives and jeopardizes the very existence of the Keys. When his wayward deckhand brings him part of the package, he and his girlfriend Mel, are drawn into the chase that ends with a plot to assassinate the President and destroy Key West.