Marc Cohen is a gravedigger; it’s his job to solve the unsolvable cases from decades ago. This morning a body was found in the park, identified as Jean Colbert, the French ambassador murdered 20 years ago. But, if this is Colbert’s body, then who was fished out of the East River two decades ago? More startling is the fact that the hole in Colbert’s head has no exit wound, no bullet, and no gunpowder residue. Just how was Jean Colbert killed? And why was it covered up? It’s Marc Cohen’s job to find out, using clues and testimony that are 20 years old.