Kurt Merchant, known to his friends as "Dirt," loses his mailroom job at a record label and ends up getting a position delivering summons papers. When he is instructed to give a "notice to appear" to Johnny Decay, a well-known rock star, he gets excited. However, when Dirt arrives at Johnny's home, Johnny has just overdosed on drugs. Being in the wrong place at the wrong time, Dirt becomes a prime murder suspect. In order to save his own skin, he is forced to become an overnight detective.