An elderly and retired police detective and a young amateur sleuth team up to find a serial killer whom has resumed a killing spree in Turin, Italy after a 17-year hiatus.

Twenty years after tragedy cut their graduation trip short, four friends return to that destination to finish what they started in 1980. However, as they find out, you can't repeat the past.

Horty, a French foundry worker, wins a contest and is sent to see the sailing of the Titanic. In England, Marie, saying she is a chambermaid on the Titanic and cannot get a room, asks to share his room. They do, chastely; when he awakens, she is gone, but he sees her at the sailing and gets a photo of her. When he returns home, he suspects that his wife Zoe has been sleeping with Simeon, the foundry owner. Horty goes to the bar, where his friends get him drunk and he starts telling an erotic fantasy of what happened with him and Marie, drawing a larger audience each night.

After the 8th September 1943 north of Italy is occupied by Germans. Italian army collapsed and the soldiers are escaped to the mountains trying to set up a resistance. Many civilians did the same and Johnny, an English literature student, is among them. Johnny avoids to band together the red partisans (communists) and tries to be part of the azure bands (former regular soldiers). But in both cases he is deluded by the partisan bands and discovers that the partisan war is less poetic and genuine that he thought. At one point anyway the partisans free Alba from Germans. When the city falls again in German hands Johnny escape with Ettore and Pierre. But, one after another, German army and Italian fascists captures the partisans and Johnny will pass the winter alone and isolated. He then finds the way to participate to one of the last attack to occupants, in fact the war will be over two months later.