Many years ago, Carlo Malaguti killed. Since then, the toughest penalty is not what he is serving in Trieste prison, but the stubborn silence in which he buried his truth about the crime, even renouncing himself in court. Among the walls of the cell of him seems to have found a shelter from the noise of the world that helps him to face the darkness that he feels within himself. Now, however, Malaguti has more than eighty years and a judge has established that he must come back free. But free to do what? To confess? To kill again? These are the questions that do not give peace to Luca Rainer, estimated translator on the critical threshold of forty. The two do not know each other, but someone wants to meet them, knowing that to tie them there can be much more than a fervent passion for literature. Entering the fortified labyrinth that is the mind of Malaguti is a difficult undertaking: Rainer will have to show itself worthy of the secrets that the killer guards, fighting with the immensity of him's solitude, and try the acre flavor of fear.