In wartime, the three main characters of the movie survived, and make a promise that at any moment when one of them finds himself in a difficult situation, they will come to each other's aid. A few years later, fate again gives them a chance to meet. The meeting point was Amsterdam. Deciding to walk the streets, they become witnesses of the murder. In the case of the investigation of the crime, they were witnesses but later turned into three suspects. Not to go to jail and clear their names before the law, they must independently investigate the brutal murder and provide strong evidence for justice.