The search for a missing child reveals she is not the only one... In a little village in Lombardy, it's a cold November morning when Ami steps out of her house to go to school... and never comes back. As soon as her father raises the alarm, a frantic search begins. The investigation is led by Police Commissioner Sensi. His men immediately find a trail to follow, but it soon proves to lead nowhere.Three months later, Police Commissioner Sensi decides to visit Dr Claps, an old friend and a renowned criminologist, who guesses from his first few words the real reason for the visit. It's not just about Ami; she's not the only little girl to have disappeared.