Venice is a city full of secrets. For hundreds of years it has been the scene of scandal, intrigue and murderous rivalries. And it remains so today.

1548, Lorenzino de Medici, himself a murderer and a man few will miss, is assassinated by two hired killers.

Today, Marmaduke Godolphin, British TV historian and a man even fewer will miss, is stabbed by a stiletto blade on the exact same spot, his body dropping into the canal.

Can the story of the first murder explain the attack on Godolphin? The Carabinieri certainly think so. They recruit retired archivist Arnold Clover to unpick the mystery and to help solve the case. But the conspiracy against Godolphin runs deeper than anyone imagined.