Low key and Lo-Fi it might be, but this still exerts a powerful pull. "Our Man", the dysfunctional main character (as listed in the credits) receives a packet in the mail that's not meant for him, which sends him on the road to retribution and the confronting of his own demons. It is, in its own way, bleakly funny, almost serving at times as a "Taxi Driver" parody, and someone else has rightly identified "Blue Ruin" as another strong influence. As Our Man, Tom E Nicholson is quietly effective, but the real find is Danika Golombek, as the daughter of his victim, with whom he forms an unlikely friendship. She has an amazingly expressive face and is genuinely touching and funny in their scenes together. If you're looking for thrills and excitement, this might not be for you, but it's definitely worth a look.
