The film follows a hazy character called Dwight Evans (Macon Blair), a mysterious outsider who returns to his hometown angrier and hairier than he went in. Why? Because bad things have befallen the people he holds dear and he's got payback in mind. Proving himself an amateur assassin, he winds up in a brutal fight to protect his estranged family.
"This is a guy who is totally out of his depth," says Blair of the character. "At the outset Dwight is scared, hesitant, regretful and devoid of toughness. I did not have to try hard to locate the emotional reality of that. Over the course of the film, he transforms into something else entirely."
Blue Ruin arrives in UK cinemas on 2 May.