Una lettera per l'inferno

After twelve years in prison, and a few months after his release, Tom Crane escapes leaving a trail of blood behind him. Why does he do this, given that there was so little time left until the end of his sentence? From what Nick and Marvin discover, the origin of the unexpected escape is the arrival of a mysterious letter. To find out the contents of the letter, the two agents go to Crane's home town, where they find FBI agents Fergus and Bristow investigating their own case. The mystery deepens, until the unexpected solution!