Corso Bramard lives in the mountains not far outside Turin. A former police inspector, he has kept out of the public eye for twenty years following the brutal killings of his wife and daughter. Periodically, the at-large murderer taunts Bramard, sending him letters containing snippets of song lyrics by Leonard Cohen. Bramard keeps them all, and spends his days haunted by twin one, to find the man who destroyed his life, and the other, to end his own life altogether. Until the day he receives the killer's latest communication, and everything changes—the murderer may have finally made a mistake, giving Bramard a vital clue about where to being the hunt. Aided by his former colleagues and by Isa, an unusual cop with a highly unorthodox style, Corso sets out to catch his monster at last.