Shards of glass lay across Piazza San Marco. Two ›baby gangs‹ have clashed violently in the darkness. While Commissario Griffoni relies on her intuition to find out how a teenager can get caught up in a flash mob, Brunetti uses his own connections. Even Vice-Questore Patta is willing to do whatever it takes to protect himself and his surroundings from any violence – which is especially unwelcome in a tourist city like Venice.