It begins with an eighty-year-old mystery. Three men - a father and his two sons - vanished without a trace while working as laborers on a dangerous project to build the first road through the Florida Everglades. Now, years later, a series of letters are unexpectedly discovered by a descendent of these men. Driven by the need to know what happened to these lost members of the family, he starts asking questions - and is quickly stonewalled. With nowhere else to turn, he enlists the help of former Philadelphia police officer Max Freeman.