British playwright Bryony Lavery, whose witty “Dirt” is playing at the Studio Theatre, is an inspired and skilled writer. Her skill allows her to write about toxic cleaning fluids as convincingly as she writes about sex and French cuisine. Her access to inspiration allows her to write about death without sounding maudlin.

Under the careful, clean direction of David Muse, “Dirt” stars five extremely talented actors, who contribute equally to the production’s authenticity. The brilliant Holly Twyford plays a high-spirited young woman, Harper, who has been dating Matt for three years. Twyford’s engaging, magnetic persona allows her to be as fascinating in death as she is in life.