The opening sequence of Sunset Boulevard begins with the Paramount logo fading into a shot of the street name. The music then becomes more dramatic as the titles play. The black and white film, old cars, clothes, and cameras shown in the first scenes immediately set the period and theme. The narrator explains in the first scene that the homicide squad has arrived about a committed crime, shown through a whip pan camera shot and police sirens. The introduction is a flashback to a murder at a mansion. Subsequent scenes show police and news cars arriving at the house to continue the investigation.