The whole song works around this chord progression: Dmin7 C#min7 Cmin7 A#7 A7 E|-x-------x------x------6----5-| B|-10------9------8------6----5-| G|-10------9------8------7----6-| D|-10h12---9h11---8h10---6----5-| A|-x-------x------x------8----7-| D|-10------9------8------6----5-| The hammer-on for the first three notes essentially removes the 7th from the chord. If want you can add a bit of percussion in between the first three notes to pad it out a and that's pretty much it!
