In a gas station in Northern Ireland, barely north of the border, Pumpgirl gets few customers beyond lecherous men and cruel women who remark on her tomboyish appearance. Otherwise guarded, she has struck up a friendship with “no helmet Hammy” — an amateur stock-car racer who prefers to spend time with his unsavory buddies over his wife and children. As Hammy’s wife, Sinead, stays home alone, she simmers with rage over her isolated, disappointing existence. On Hammy’s birthday, their lives become perilously intertwined, leaving them face to face with a desperate future.