Abby Rosebrock’s 2018 dark comedy, Dido of Idaho, featured an act of extreme violence carried out with a household object. Her 2019 follow-up, Blue Ridge, focused on addicts trying to form relationships in the midst of a recovery program. Her new work, a twisted tale of good will and bad romance called Lowcountry, utilizes both of these dramatic elements in its exploration of a first date warped by bouts of desperation and deception. In this Atlantic Theater Company production directed by Jo Bonney, some scenes might be over-extended, but the sexual tension simmers, then boils over.