(previews start on Aug. 5; opens on Aug. 25) New Yorkers know Naomi Wallace for "One Flea Spare," a stunner of a psychosexual drama, set during the Black Death. They'll get to know her better during her tenure as the Signature's Residency One playwright. Her season opens with this play, set in the 1950s, about two young women who form a risky friendship while in prison.