Proffesional film opening analysis Se7en, Opening 2 mins (horror/mystery/thriller)

This is a drama/thriller/mystery film. There is a constant tone and beat to the music that plays throughout and doesn't change only in last 10-30 seconds when the opening comes to a close. There are no characters to give anything away, therefore no dialogue. It is just weird shots of visual things on a bage and dull background. There is good use of sound fx, text